原生js之图片预览的封装-白红宇

原生js之图片预览的封装

阅读量：201 次

发布时间：2019-02-28

本文共 270 字，大约阅读时间需要 1 分钟。

图片预览

_this：input[file]对象

_thisNext：下一个要操作的dom对象

cb：回调函数

function changeImg(_this,_thisNext,cb){	var reader = new FileReader();    reader.readAsDataURL(_this.files[0]);	reader.onload = function(e){		_this.nextSibling.src = e.target.result;		if(cb){			cb(_thisNext);		}	}}

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