使用JavaScript捕获浏览文件窗口的关闭 [英] Capturing the close of the browse for file window with JavaScript

问题描述

我正在使用infile要求用户浏览其计算机上的文件.如果没有选择文件就关闭了窗口，是否有办法捕捉?
例如，如果单击x.

I am using infile to ask the users to browse for a file on their machine. Is there way to catch if the window is closed without file being selected?
For example if x is clicked.

<input type="file" name="data" id="inFile" size="15" style="display:none" onchange="handleFiles(this)"/>

谢谢

推荐答案

我所做的是: 用户打开窗口后启动计时器，在该计时功能中，我每0.5秒检查一次是否已使用boolean var选择了文件.用户选择文件或HTML5 DnD发生时，我立即停止计时器.我希望这对某人有帮助.

What I did is: Start timer after the user opens the window, and in that timed function I check every 0.5 sec if the file has been selected with boolean var. I stop the timer as soon as user selects the file or HTML5 DnD occurs. I hope this helps someone.

<div id="uploader"><input type="file" name="data" id="inFile" size="15" style="display:none" onchange="handleFiles(this)"/></div>

<button dojoType="dijit.form.Button" id="fileSelect" type="button" onmouseup="browse();">Browse</button> 

var fileselected = false;
function handleFiles(input){
    fileselected = true;
//use input
}

var interval;
function browse(){
    fileselected = false;
    var fileElem = document.getElementById("inFile");
    fileElem.click();
    interval = setInterval(setdiv, 500);

}
function setdiv(){
    if(!fileselected){  
        //do staff until user decides to Dnd or  browse for file again
        clearInterval(interval);
    }   
}

这篇关于使用JavaScript捕获浏览文件窗口的关闭的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！