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This will write "Hello world!" on every page, below the title, until you remove the code. User scripts are written in JavaScript, and both of the above code snippets are in JavaScript. The second snippet uses JQuery, a JavaScript library that specializes in manipulating HTML. $ is a JQuery function that lets us target the HTML element we want.
Ext JS is a composition of classes that has many capabilities. Some examples: an abstract layer for browsers (e.g. Ext.isArray that can be used as a replacement for Array.isArray)
It also adds classes to the HTML element based on what features are and are not natively supported. To perform feature detection tests, Modernizr often creates an element, sets a specific style instruction on that element and then immediately tries to retrieve that setting.
Access to and manipulation of multiple DOM nodes in jQuery typically begins with calling the $ function with a CSS selector string. This returns a jQuery object referencing all the matching elements in the HTML page. $("div.test"), for example, returns a jQuery object with all the div elements that have the class test. This node set can be ...
jQuery can attach functions to the onLoad event: $( myFunction ); Functions can also be written inline as $( function() { // Code here } ); Do not assign window.onload to a function directly, as this overwrites any other onLoad functions that may have been previously set.
Each of these classes is called utility classes. There are many utility classes in Tailwind CSS that enable to control a large number of CSS properties like colors, border, display type ( display ), font size and font, layout, shadow...
The jQuery library provides a function jQuery.noop(), which does ... for example the syntax for definition of a class requires an indented block with the class ...
Because all objects evaluate as true, a method such as .valueOf(), or .toString(), must be used to retrieve the wrapped value. For explicit coercion to the Boolean type, Mozilla recommends that the Boolean() function (without new ) be used in preference to the Boolean object.