我正在查看window.onload=function(){
window.URL = window.URL || window.webkitURL;
var fileSelect = document.getElementById("fileSelect"),
fileElem = document.getElementById("fileElem"),
fileList = document.getElementById("fileList");
fileSelect.addEventListener("click", function (e) {
if (fileElem) {
fileElem.click();
}
e.preventDefault(); // prevent navigation to "#"
}, false);
}
function handleFiles(files) {
if (!files.length) {
fileList.innerHTML = "<p>No files selected!</p>";
} else {
fileList.innerHTML = "";
var list = document.createElement("ul");
fileList.appendChild(list);
for (var i = 0; i < files.length; i++) {
if(files[i].size > 1000000) {
alert(files[i].name + ' is too big. Please resize it and try again.');
} else {
var li = document.createElement("li");
list.appendChild(li);
var img = document.createElement("img");
img.src = window.URL.createObjectURL(files[i]);
img.height = 60;
img.setAttribute("class", "shotzPrev");
img.onload = function() {
window.URL.revokeObjectURL(this.src);
}
li.appendChild(img);
var info = document.createElement("span");
info.innerHTML = files[i].name + "<br>" + files[i].size + " bytes";
li.appendChild(info);
}
}
}
}
webpack配置，它包含以下代码：
create-react-app我知道可以使用{
test: /\.css$/,
loader: 'style!css?importLoaders=1!postcss'
},
将webpack加载器链接在一起，例如!，但我不熟悉style-loader!css-loader!less-loader语法及其后的所有内容。这到底在做什么？