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2017 年 08 月,学习总结 #14
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08 月 16 日JS执行上下文栈
|
08 月 17 日JS变量对象
执行过程
进入执行上下文进入执行上下文时,代码还没被执行。 变量对象会包括:
代码执行代码执行阶段,会再次修改变量对象的属性值。 |
08 月 21 日JSArray.prototype.slice.call(arguments)Array.prototype.slice = function(start, end) {
var result = new Array();
start = start || 0;
end = end || this.length;
for (var i = start; i < end; i++) {
result.push(this[i]);
}
return result;
}; instanceofinstanceof 运算符用来测试一个对象在其原型链中是否存在一个构造函数的 prototype 属性。 |
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08 月 08 日
Vue
最近写 Select 组件时候将 Option 插入到了 body 下,用到了 transition 的钩子
@before-enter
和@before-leave
,但是发现在 IE9 上这些钩子是不触发的,所以暂时只能 watch visible 来触发事件。参考链接 。
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