随笔分类 -  JavaScript

• Symbol
  摘要：【Symbol】 The Symbol() function returns a value of type symbol. it does not support the syntax "new Symbol()". Every symbol value returned from Symbol( 阅读全文
  posted @ 2017-03-26 11:04 Tekkaman 阅读(169) 评论(0) 推荐(0)
• Object.defineProperty
  摘要：【Object.defineProperty】 1、The Object.defineProperty() method defines a new property directly on an object, or modifies an existing property on an obje 阅读全文
  posted @ 2017-03-25 17:49 Tekkaman 阅读(160) 评论(0) 推荐(0)
• 动态作用域
  摘要：【动态作用域】 作用域有两种： 1、动态作用域 2、词法作用域 JavaScript 中的作用域就是词法 作用域（事实上大部分语言都是基于词法作用域的）。但实际上动态作用域是 JavaScript 另一个重要机制 this 的表亲 词法作用域让 foo() 中的 a 通过 RHS 引用到了全局作用域 阅读全文
  posted @ 2017-03-25 11:20 Tekkaman 阅读(581) 评论(0) 推荐(0)
• eval()
  摘要：【eval】 1、只处理字符串 If the argument of eval() is not a string, eval() returns the argument unchanged. In the following example, the String constructor is 阅读全文
  posted @ 2017-03-24 11:42 Tekkaman 阅读(195) 评论(0) 推荐(0)
• common mistake of closure in loops
  摘要：【common mistake of closure in loops】 下例中item引用的始终是最后一个值。 function showHelp(help) { document.getElementById('help').innerHTML = help; } function setupH 阅读全文
  posted @ 2017-03-24 11:08 Tekkaman 阅读(111) 评论(0) 推荐(0)
• Emulating private methods with closures
  摘要：【Emulating private methods with closures】 JavaScript does not provide a native way of doing this, but it is possible to emulate private methods using 阅读全文
  posted @ 2017-03-24 10:52 Tekkaman 阅读(276) 评论(0) 推荐(0)
• Computed property names
  摘要：【Computed property names】 That allows you to put an expression in brackets [], that will be computed as the property name. 参考：https://developer.mozill 阅读全文
  posted @ 2017-03-23 11:03 Tekkaman 阅读(198) 评论(0) 推荐(0)
• Spread Syntax
  摘要：【Spread Syntax】 The spread syntax allows an expression to be expanded in places where multiple arguments are expected. 1、为了将[]传递给一个函数，过去使用apply方法 ES20 阅读全文
  posted @ 2017-03-20 17:25 Tekkaman 阅读(223) 评论(0) 推荐(0)
• Template literals
  摘要：【Template literals】 Template literals are string literals allowing embedded expressions. You can use multi-line strings and string interpolation featu 阅读全文
  posted @ 2017-02-10 16:51 Tekkaman 阅读(246) 评论(0) 推荐(0)
• Javascript Iterator
  摘要：【Javascript Iterator】 1、@@iterator Whenever an object needs to be iterated (such as at the beginning of a for..of loop), its @@iteratormethod is calle 阅读全文
  posted @ 2017-02-10 15:00 Tekkaman 阅读(218) 评论(0) 推荐(0)
• Arrow Function
  摘要：【Arrow Function】 1、Basic Syntax 2、Advanced Syntax 3、No binding of this An arrow function does not create its own this context, so this has its origina 阅读全文
  posted @ 2017-02-10 10:38 Tekkaman 阅读(207) 评论(0) 推荐(0)
• destructuring assignment
  摘要：【destructuring assignment】 The destructuring assignment syntax is a JavaScript expression that makes it possible to extract data from arrays or object 阅读全文
  posted @ 2017-02-09 17:43 Tekkaman 阅读(198) 评论(0) 推荐(0)
• new.target
  摘要：【new.target】 The new.target property lets you detect whether a function or constructor was called using the newoperator. In constructors and functions 阅读全文
  posted @ 2017-02-09 16:35 Tekkaman 阅读(143) 评论(0) 推荐(0)
• Javascript Hoisting
  摘要：【Javascript Hoisting】 hoisting teaches that variable and function declarations are physically moved to the top your coding, but this is not what happe 阅读全文
  posted @ 2017-02-09 16:10 Tekkaman 阅读(131) 评论(0) 推荐(0)
• Javascript Bind
  摘要：【Javascript Bind】 The bind() method creates a new function that, when called, has its this keyword set to the provided value, with a given sequence of 阅读全文
  posted @ 2017-02-09 15:05 Tekkaman 阅读(208) 评论(0) 推荐(0)
• Javascript Property Names
  摘要：【Javascript Property Names】 Property names must be strings. This means that non-string objects cannot be used as keys in the object. Any non-string ob 阅读全文
  posted @ 2017-02-09 10:43 Tekkaman 阅读(251) 评论(0) 推荐(0)
• ==与===
  摘要：【==与 】 ==， 两边值类型不同的时候，要先进行类型转换，再比较。 ，不做类型转换，类型不同的一定不等。 参考：http://relucent.iteye.com/blog/835521 阅读全文
  posted @ 2017-01-29 19:30 Tekkaman 阅读(138) 评论(0) 推荐(0)
• javascript中所有函数的参数都是按值传递的
  摘要：【javascript中所有函数的参数都是按值传递的】 参考：http://www.jb51.net/article/89297.htm 阅读全文
  posted @ 2017-01-28 20:48 Tekkaman 阅读(224) 评论(0) 推荐(0)
• Promise.race
  摘要：【Promise.race】 返回最先完成的promise https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/race 阅读全文
  posted @ 2017-01-05 14:43 Tekkaman 阅读(205) 评论(0) 推荐(0)
• javascript 伪协议
  摘要：【javascript 伪协议】 将javascript代码添加到客户端的方法是把它放置在伪协议说明符javascript:后的URL中。这个特殊的协议类型声明了URL的主体是任意的javascript代码，它由javascript的解释器运行。如果javascript:URL中的javascrip 阅读全文
  posted @ 2016-12-13 20:23 Tekkaman 阅读(4490) 评论(0) 推荐(0)