We will learn how to convert variable arguments by using rest operator in JavaScript. .sass-btn { color: #fff; background-color: #0069d9; margin: 5px; @include button-size(); @include box-shadow(0px 4px 5px #, 2px 6px 10px #); } @mixin box-shadow($sh…

convert image to base64 in javascript "use strict"; /** * * @author xgqfrms * @license MIT * @copyright xgqfrms * @created 2020-05-16 * @modified * * @description convert image to base64 in javascript * @augments * @example * @link * */ const lo…

This is an introduction to CSSinJS that doesn't require any JavaScript knowledge, just a basic CSS. It shows how to convert a very basic button written in Sass (SCSS) to CSSinJS without using any CSS in JS libraries. It uses native JavaScript variabl…

Tired of dealing with monolithic CSS files? Are requests for multiple CSS files hurting your performance? In this lesson we learn how to separate our styles with SCSS partials, and how SCSS imports compile to one file so there's only one request. Thi…

1.所 有的函数都有属于自己的一个arguments对象,它包括了函所要调用的参数.他不是一个数组,如果用typeof arguments,返回的是’object’.虽然我们可以用调用数据的方法来调用arguments.比如length,还有index方法.但是数 组的push和pop对象是不适用的. 2.函数定义时的参数个数和函数调用时的参数个数没有任何关系. 在函数中可以用f.arguments[0]和f.arguments[1]得到调用时传入的第一和第二个参数,arguments不能够创建…

预编译scss步骤: 1 搜索ruby并安装,点击 2 安装sass: 3 在hubuilder工具中设置预编译: 触发命令地址为ruby安装地址 命令参数为 %FileName% %FileBaseName%.css less预编译则 npm install less -g 然后智能完成即可 scss和less px 转rem 1 首先设置默认字符大小 <script> (function() { var html = document.documentElement; var hWidth…

In Javascript, all function arguments are optional by default. That means if you ever forget to pass a critical parameter, the code will just fail without warning you what went wrong. There are many workarounds for this, and in this lesson, you will…

You can use number as function/variable name, the numberic name can't be accessed from parent scope, but can be accessed by 'this' in private scope. var o= { attr1:'value of attr1', 1:'private attr ,the index is 1', 301:function(){ console.log('priva…

https://stackoverflow.com/questions/1759987/listening-for-variable-changes-in-javascript…

sass官网: http://sass-lang.com/ http://sass-lang.com/documentation/file.SASS_REFERENCE.html Sass和Scss的关系 There are two syntaxes available for Sass. The first, known as SCSS (Sassy CSS) and used throughout this reference, is an extension of the syntax o…