Javascript-如何从文件输入控件中提取文件名

假设您的 < input type =“ file”>具有上 载 ID，则有望实现这一目标：

var fullPath = document.getElementById('upload').value;if (fullPath) {    var startIndex = (fullPath.indexOf('\') >= 0 ? fullPath.lastIndexOf('\') : fullPath.lastIndexOf('/'));    var filename = fullPath.substring(startIndex);    if (filename.indexOf('\') === 0 || filename.indexOf('/') === 0) {        filename = filename.substring(1);    }    alert(filename);}