CSS Animation onClick
Are you sure you only display your page on webkit? Here is the code, passed on safari. The image (id=’img’) will rotate after button click.
javascript
How to change date format in JavaScript
You can certainly format the date yourself.. You can also use an external library, such as DateJS. Here’s a DateJS example:
How do I modify the URL without reloading the page?
This can now be done in Chrome, Safari, Firefox 4+, and Internet Explorer 10pp4+! See this question’s answer for more information: Updating address bar with new URL without hash or reloading the page Example: You can then use window.onpopstate to detect the back/forward button navigation: For a more in-depth look at manipulating browser history, see this MDN … Read more
jQuery: Check if div with certain class name exists
You can simplify this by checking the first object that is returned from JQuery like so: In this case if there is a truthy value at the first ([0]) index, then assume class exists. Edit 04/10/2013: I’ve created a jsperf test case here.
Javascript Comparison Operators != vs !==
Human readable text about their differences Using !== and === will do a more strict compare than ==/!=. The former will check if the objects being compared are of the same type, as well as if the values matches. Using == will make it possible for an implicit cast to be made, see the below examples. What does the standard say? 11.9.6 … Read more
How does += (plus equal) work?
1 += 2 is a syntax error (left-side must be a variable). x += y is shorthand for x = x + y.
How to measure time taken by a function to execute
Using performance.now(): In Node.js it is required to import the performance class importing performance Using console.time: (living standard) Note:The string being passed to the time() and timeEnd() methods must match(for the timer to finish as expected). console.time() documentations: MDN documentation Node.js documentation
How do I include a JavaScript file in another JavaScript file?
The old versions of JavaScript had no import, include, or require, so many different approaches to this problem have been developed. But since 2015 (ES6), JavaScript has had the ES6 modules standard to import modules in Node.js, which is also supported by most modern browsers. For compatibility with older browsers, build tools like Webpack and Rollup and/or transpilation tools like Babel can be used. … Read more
What does window.jQuery and window.$ mean?
I will pull from an article I linked to in a comment above: As discussed in the JavaScript Basics section, valid names in JavaScript can be pretty much anything, as long as they don’t begin with a number and don’t include a hyphen. So, the $ in the code above is just a shorter, more … Read more
document.getElementById not working / Display
There are two mistakes here, You need to surround id with ” (Double Quotes) You should put script tag after the dom element is created, else it may execute before the actual dom is created. Even if you keep js code in a separate file, make sure you write it after your dom, just before the body tag ends. So your code should be … Read more