Frequently Asked Questions
The idea behind creating this section is to provide you quick and working solutions for the common tasks and issues related to web design and development.
HTML / CSS
This section contains a collection of frequently asked questions related to HTML and CSS
- How to write comments in HTML
- How to write comments in CSS
- How to remove dotted line around the links using CSS
- How to align text vertically center in a DIV element using CSS
- How to set the height of a DIV to 100% using CSS
- How to align a DIV horizontally center using CSS
- How to change the background transparency without affecting the child elements
- How to define style sheet only for Internet Explorer
- How to show hide dropdown menu on mouse hover using CSS
- How to remove white space underneath an image using CSS
- What is the maximum length of title and meta description tag in HTML
- How to highlight alternate table row using CSS
- How to fix CSS collapsing parent issue
- How to create custom cursor using CSS
- How to apply shadow effect on elements using CSS
- How to apply shadow effect on text using CSS
- How to disable spell checking in HTML forms
- How to create drop caps effect using CSS
- How to center align absolute positioned DIV horizontally using CSS
- How to add border to an element on mouse hover without affecting the layout in CSS
- How to apply CSS opacity in IE7 and IE8 browsers
- How to create 3D flipping effect on mouse hover using CSS
- How to animate text color on mouse hover using CSS
- How to animate background-color of an element on mouse hover using CSS
- How to transform image size on mouse hover without affecting the layout in CSS
- How to make a DIV element editable in HTML
- How to disable resizable property of textarea using CSS
- How to expand select box to its default width on focus using CSS
- How to change the default text selection color in the browsers using CSS
- How to remove the space between inline-block elements in CSS
- How to disable text selection highlighting in the browsers using CSS
- How to change input field or textarea placeholder text color using CSS
- How to truncate long string with ellipsis using CSS
- How to create triangle or caret icons using CSS
- How to remove outline around text input boxes in chrome using CSS
- How to apply multiple background images to an element using CSS
- How to create fixed header or footer using CSS
- How to create two DIV elements with same height side by side in CSS
- How to set table cellpadding and cellspacing in CSS
- How to remove cellspacing from tables using CSS
- How to place border inside of a DIV element using CSS
- How to change image on hover with CSS
- How to position text over an image using CSS
- How to create an HTML button that acts like a link
- How to create a vertical line in HTML
- How to change the cursor into a hand pointer on hover using CSS
- How to make a DIV not larger than its contents using CSS
- How to auto resize an image to fit into a DIV container using CSS
- How to change the color of an HR element using CSS
- How to create an unordered list without any bullets in HTML
- How to overlay one div over another DIV using CSS
- How to stretch and scale an image in the background with CSS
- How to disable a link using only CSS
- How to vertically align an image inside a DIV using CSS
- How to align content of a DIV to the bottom using CSS
- How to make a placeholder for a select box in HTML
- How to hide the scrollbar on an HTML page
- How to make a DIV vertically scrollable using CSS
- How to right align flex item using CSS
- How to center a DIV horizontally and vertically using flexbox in CSS
- How to remove border from iframe in HTML
- How to reset or remove CSS style for a particular element
- How to set fixed width for td regardless of its content
- How to remove underline from link in HTML
- How to make body to have 100% of the browser height
- How to set space between flex items using CSS
- How to apply transition on CSS display property
- How to scale font size based on the viewport width using CSS
- How to transition height from 0 to auto using CSS
- How to vertically align text next to an image using CSS
- How to vertically center a DIV element using CSS
- How to apply a CSS filter to the background image of an element
- How to combine background image and CSS3 gradient on the same element
- How to create a full screen iframe with 100% height
- How to make a DIV to fill the height of the remaining screen space
- What is the CSS selector for first element with specific class
- How to center text horizontally and vertically inside a DIV block using CSS
- What characters can be used to display up and down triangle in HTML
- How to set space between two rows in an HTML table
- How to embed image in a button element in HTML
JavaScript / jQuery
This section contains a collection of frequently asked questions related to JavaScript and jQuery
- How to write comments in JavaScript
- How to show and hide DIV elements based on the selection of radio buttons in jQuery
- How to show and hide DIV elements based on the click of checkboxes in jQuery
- How to show and hide DIV elements based on dropdown selection in jQuery
- How to define a function in jQuery
- How to define a function in JavaScript
- How to call a function after waiting for some time in jQuery
- How to add CSS properties to an element dynamically using jQuery
- How to add attribute to an HTML element in jQuery
- How to remove attribute from an HTML element in jQuery
- How to add elements to DOM in jQuery
- How to remove elements from DOM in jQuery
- How to remove white space from a string using jQuery
- How to find number of characters in a string using jQuery
- How to remove the clickable behavior from a disabled link using jQuery
- How to create custom radio buttons using CSS and jQuery
- How to create custom checkboxes using CSS and jQuery
- How to create custom select boxes using CSS and jQuery
- How to check a checkbox is checked or not using jQuery
- How to create a string by joining the elements of an array in JavaScript
- How to get value of selected radio button using jQuery
- How to get the values of selected checkboxes in a group using jQuery
- How to bind click event to dynamically added HTML elements in jQuery
- How to set the width of a DIV element dynamically using jQuery
- How to set the height of a DIV element dynamically using jQuery
- How to remove wrapper element but keep the text content intact using jQuery
- How to animate a DIV height based on the content using jQuery
- How to highlight alternate table row using jQuery
- How to get the current page url using jQuery
- How to calculate the number of words in a string using jQuery
- How to find substring between the two words using jQuery
- How to get the value of selected option in a select box using jQuery
- How to get the text inside an element using jQuery
- How to check an element is visible or not using jQuery
- How to populate state dropdown based on selection in country dropdown using jQuery
- How to get the position of an element relative to the document using jQuery
- How to get the position of an element relative to the parent using jQuery
- How to find mouse position relative to the document using jQuery
- How to find mouse position relative to an element using jQuery
- How to get substring from a string using jQuery
- How to show read more link if the text exceeds a certain length using jQuery
- How to get current image size in JavaScript
- How to get original image size in JavaScript
- How to increase and decrease image size using JavaScript
- How to create jQuery slide up and down toggle effect
- How to create jQuery slide left and right toggle effect
- How to animate DIV height on mouse hover using jQuery
- How to animate DIV width on mouse hover using jQuery
- How to play and stop CSS animation using jQuery
- How to disable or enable a form element using jQuery
- How to disable all input controls inside a form using jQuery
- How to check or uncheck radio button dynamically using jQuery
- How to check or uncheck a checkbox dynamically using jQuery
- How to remove first character from a string in jQuery
- How to stop firing event until an effect is finished in jQuery
- How to check if an element exists in jQuery
- How to move an element to left, right, up and down using arrow keys in jQuery
- How to animate opacity of an element on mouse hover using jQuery
- How to hide dropdown menu on click outside of the element in jQuery
- How to toggle text inside an element on click using jQuery
- How to customize file input type box using CSS and jQuery
- How to fire event on file select in jQuery
- How to get selected file name from input type file using jQuery
- How to update DIV content automatically while typing in textarea using jQuery
- How to insert HTML content into an iFrame using jQuery
- How to call a function repeatedly after fixed time interval in jQuery
- How to redirect to another web page using jQuery
- How to check if an element is hidden using jQuery
- How to select all visible or hidden elements in a page using jQuery
- How to add or remove rows inside a table dynamically using jQuery
- How to move an element into another element using jQuery
- How to change href attribute of a hyperlink using jQuery
- How to refresh a page with jQuery
- How to select an element with multiple classes with jQuery
- How to loop through an array in JavaScript
- How to replace character inside a string in JavaScript
- How to explode or split a string in JavaScript
- How to assign block of HTML code to a JavaScript variable
- How to display all items or values in an array using loop in jQuery
- How to get number of elements in a DIV using jQuery
- How to replace all occurrences of a string in JavaScript
- How to check whether a value is numeric or not in jQuery
- How to replace multiple spaces with single space in JavaScript
- How to detect click inside iframe using JavaScript
- How to determine if variable is undefined or null in JavaScript
- How to get element by class name in JavaScript
- How to detect enter key press on keyboard using jQuery
- How to detect the enter key press in a text input field using jQuery
- How to change the background color of a web page using JavaScript
- How to check if a variable exists or defined in JavaScript
- How to get the value of a textarea in jQuery
- How to make the first letter of a string uppercase in JavaScript
- How to create multiline strings in JavaScript
- How to check whether a string contains a substring in JavaScript
- How to encode URL in JavaScript
- How to remove duplicate values from a JavaScript array
- How to remove a property from a JavaScript object
- How to check if a value exists in an array in JavaScript
- How to get day, month and year from a date object in JavaScript
- How to remove a specific item from an array in JavaScript
- How to change the class of an element using JavaScript
- How to convert comma separated string into an array in JavaScript
- How to get the class name of an object in JavaScript
- How to check for an empty string in JavaScript
- How to sort an array of integers correctly in JavaScript
- How to return multiple values from a function in JavaScript
- How to get the current URL with JavaScript
- How to include a JavaScript file in another JavaScript file
- How to detect screen resolution with JavaScript
- How to parse JSON in JavaScript
- How to split a string into an array of characters in JavaScript
- How to dynamically access object property using variable in JavaScript
- How to append values to an array in JavaScript
- How to generate a timestamp in JavaScript
- How to convert JavaScript object to JSON string
- How to add new elements at the beginning of an array in JavaScript
- How to get the value of text input field using JavaScript
- How to adjust iFrame height automatically according to its contents using JavaScript
- How to call multiple JavaScript functions in a single onclick event
- How to store JavaScript objects in HTML5 localStorage
- How to get portion of URL path in JavaScript
- How to add a class to a given element in JavaScript
- How to find the max and min values of an array in JavaScript
- How to check if an object property is undefined in JavaScript
- How to capture browser window resize event in JavaScript
- How to reset a form using jQuery
- How to detect a click outside of an element with jQuery
- How to detect change in a text input box in jQuery
- How to foreach over an array in JavaScript
- How to check if an input field is empty using jQuery
- How to get the children of the this selector in jQuery
- How to check if the mouse is over an element in jQuery
- How to scroll to the top of the page using jQuery
- How to insert an item into an array at a specific index in JavaScript
- How to get the id of the element that fired an event in jQuery
- How to find the sum of an array of numbers in JavaScript
- How to check if an array includes an object in JavaScript
- How to submit a form using jQuery
- How to create a DIV element in jQuery
- How to convert a JS object to an array using jQuery
- How to change the image source using jQuery
- How to select an element by name in jQuery
- How to find an element based on a data-attribute value in jQuery
- How to set CSS background-image property using jQuery
- How to detect a mobile device in jQuery
- How to get the data-id attribute of an element using jQuery
- How to check if object is an array in JavaScript
- How to remove an event handler in jQuery
- How to get the id of an element using jQuery
- How to add options to a select box from a JS object using jQuery
- How to replace innerHTML of a div using jQuery
- How to add LI in an existing UL using jQuery
- How to get the value in an input text box using jQuery
- How to change CSS display property to none or block using jQuery
- How to set the value of input text box using jQuery
- How to change the text of a button using jQuery
- How to loop through elements with the same class in jQuery
- How to allow only numeric value in HTML text input using jQuery
- How to check for a hash in a URL using JavaScript
- How to convert a float number to a whole number in JavaScript
- How to fix $ is not defined error in jQuery
- How to get class list of an element with jQuery
- What is jQuery $(document).ready() equivalent in JavaScript
- How to set or unset a cookie with jQuery
- How to show loading spinner in jQuery
- How to preview an image before it is uploaded using jQuery
- How to get class name using jQuery
- How to sleep before continuing in JavaScript
- How to set value of textarea in jQuery
- How to convert UTC date time to local date time in JavaScript
- How to load local JSON file using jQuery
- How to trigger a click on a link using jQuery
- How to get the class of the clicked element in jQuery
- How to AJAX submit a form in jQuery
- How to count number of rows in a table using jQuery
- How to merge two arrays in JavaScript
- How to check if a value is an object in JavaScript
- How to loop through a JavaScript object
- How to display a JavaScript object
- How to add a key value pair to an object in JavaScript
- How to test for an empty object in JavaScript
- How to check if a key exists in a JavaScript object
- How to sort an array of objects by property values in JavaScript
- How to merge the properties of two JavaScript objects
- How to get the length of a JavaScript object
- How to check if an element contains a class in JavaScript
- How to create a two dimensional array in JavaScript
- How to empty an array in JavaScript
- How to get query string parameters values in JavaScript
- How to remove empty elements from an array in JavaScript
- How to stop setInterval call in JavaScript
- How to trigger a button click on enter key press in a text box in JavaScript
- How to get the last item in an array in JavaScript
- How to get the current date in JavaScript
- How to convert a string to boolean in JavaScript
- How to format a JavaScript date
- How to parse a string to a date object in JavaScript
- How to find an object by property value in an array of JavaScript objects
- How to get month name from a date in JavaScript
- How to convert decimal values to hexadecimal in JavaScript
- How to check if a variable is a string in JavaScript
- How to set default parameter value for a JavaScript function
- How to add days to current date in JavaScript
- How to compare two dates in JavaScript
- How to convert a unix timestamp to time in JavaScript
- How to copy array by value in JavaScript
- How to remove text from a string in JavaScript
- How to check if an array exists and not empty in JavaScript
- How to get a random item from a JavaScript array
- How to format JavaScript date as yyyy mm dd
- How to remove an item from a JavaScript array by value
- How to generate a random number between two numbers in JavaScript
- How to pretty print JSON using JavaScript
- How to add an object to an array in JavaScript
- How to add new property to JSON object using JavaScript
- How to set time delay in JavaScript
BOOTSTRAP / SASS
This section contains a collection of frequently asked questions related to Bootstrap framework
- How to open Bootstrap dropdown menu on hover rather than click
- How to add Bootstrap tooltip to an icon
- How to add icons to input submit button in Bootstrap
- How to align Bootstrap modal vertically center
- How to embed YouTube video inside Bootstrap modal
- How to change the default width of Bootstrap modal box
- How to insert close button in Bootstrap popover
- How to make Bootstrap popover appear/disappear on hover instead of click
- How to insert image inside Bootstrap popover
- How to disable tabs in Bootstrap
- How to keep the current tab active on page reload in Bootstrap
- How to launch Bootstrap modal on page load
- How to prevent Bootstrap modal from closing when clicking outside
- How to remove slide down effect from Bootstrap modal
- How to set focus on input field or textarea inside a Bootstrap modal on activation
- How to change Bootstrap default input focus glow style
- Autoplay YouTube video inside Bootstrap modal
- How to align responsive image in center in Bootstrap
- How to align text in Bootstrap
- How to center a column in Bootstrap
- How to close a Bootstrap modal window using jQuery
- How to get centered content in Bootstrap
- How to get right aligned buttons in Bootstrap
- How to left and right align text within a DIV in Bootstrap
- How to center buttons in Bootstrap
- How to open a Bootstrap modal window using jQuery
- How to vertical align a DIV in Bootstrap
PHP / MySQL
This section contains a collection of frequently asked questions related to PHP and MySQL database
- How to write comments in PHP
- How to remove white space from a string in PHP
- How to find number of characters in a string in PHP
- How to find number of words in a string in PHP
- How to remove special characters from a string in PHP
- How to replace a word inside a string in PHP
- How to prepend a string in PHP
- How to append a string in PHP
- How to extract substring from a string in PHP
- How to compare two strings in PHP
- How to get current page URL in PHP
- How to create a string by joining the values of an array in PHP
- How to split a string into an array in PHP
- How to combine two strings in PHP
- How to convert a string to lowercase in PHP
- How to convert a string to uppercase in PHP
- How to convert the first letter of a string to uppercase in PHP
- How to convert special HTML entities back to characters in PHP
- How to remove white space from the beginning of a string in PHP
- How to remove white space from the end of a string in PHP
- How to create a new line in PHP
- How to find string length in PHP
- How to check whether a variable is set or not in PHP
- How to check whether a variable is empty in PHP
- How to check whether a variable is null in PHP
- How to reverse a string in PHP
- How to replace the part of a string with another string in PHP
- How to count how many times a substring occurs in a string in PHP
- How to count all elements in an array in PHP
- How to print or echo all the values of an array in PHP
- How to display array structure and values in PHP
- How to reverse the order of an array in PHP
- How to check if a value exists in an array in PHP
- How to check if a key exists in an array in PHP
- How to remove the last element from an array in PHP
- How to remove the first element from an array in PHP
- How to add elements to the beginning of an array in PHP
- How to add elements to the end of an array in PHP
- How to merge two or more arrays into one array in PHP
- How to sort an array values alphabetically in PHP
- How to remove duplicate values from an array in PHP
- How to randomize the order of an array in PHP
- How to compare two array values in PHP
- How to calculate the sum of values in an array in PHP
- How to remove empty values from an array in PHP
- How to populate dropdown list with array values in PHP
- How to get all the keys of an associative array in PHP
- How to get all the values from an associative array in PHP
- How to sort an associative array by key in PHP
- How to sort an associative array by value in PHP
- How to get single value from an array in PHP
- How to loop through multidimensional array in PHP
- How to delete an element from an array in PHP
- How to check if a string contains a specific word in PHP
- How to get the current date and time in PHP
- How to make a redirect in PHP
- How to strip all spaces out of a string in PHP
- How to get the current year using PHP
- How to convert a date from yyyy-mm-dd to dd-mm-yyyy format in PHP
- How to convert a string to a number in PHP
- How to get the first element of an array in PHP
- How to convert a date to timestamp in PHP
- How to add elements to an empty array in PHP
- How to convert an integer to a string in PHP
- How to delete PHP array element by value not key
- How to push both key and value into an array in PHP
- How to refresh a page periodically using PHP
- How to remove the last character from a string in PHP
- How to return JSON from a PHP script
- How to get PHP errors to display
Ubuntu / Linux
This section contains a collection of frequently asked questions related to Ubuntu or Linux OS
- How to shut down or reboot Ubuntu from terminal
- How to restart Apache server on Ubuntu
- How to start stop MySQL server on Ubuntu
- How to change current working directory in Ubuntu terminal
- How to rename a directory via command line in Ubuntu
- How to copy the contents of a folder to another folder from terminal in Ubuntu
- How to install updates via command line on Ubuntu
- How to delete a non empty directory from terminal in Ubuntu
- How to get a list of all installed packages on Ubuntu
- How to completely remove a package or application in Ubuntu
- How to unzip a zip file from the terminal in Ubuntu
- How to save terminal output of a command to a file in Ubuntu
- How to search for available packages from the command line in Ubuntu
- How to find and replace text within a file using command line in Ubuntu
- How to get the size of a directory from the command line in Ubuntu
- How to open a text file in terminal in Ubuntu
- How to remove all files from a directory using command line in Ubuntu
- How to find the amount of free disk space in Ubuntu
- How to create an empty file from command line in Ubuntu
- How to check the current version of Ubuntu from the command line
- How to append multiple lines to a file from terminal in Ubuntu
- How to zip all files in a directory using command line in Ubuntu
- How to extract a .tar.gz file using command line in Ubuntu
- How to make ls command to show file sizes in megabytes in Ubuntu
- How to find a file by name using command line in Ubuntu
