這是官方文檔的用法：// Callback from a <input type="file" onchange="onChange(event)">function onChange(event) {
var file = event.target.files[0]; var reader = new FileReader();
reader.onload = function(event) { // The file's text will be printed here
console.log(event.target.result)
};
reader.readAsText(file);
}但如果我想傳遞一個參數(shù)給function(event){}, 應(yīng)該怎么做，我試過如下定義：var a = 1;
reader.onload = function(event, a) { // The file's text will be printed here
console.log(event.target.result)
};
FileReader.onload 怎么傳遞額外的參數(shù)給onload函數(shù)
素胚勾勒不出你
2018-09-11 09:19:39
