----------------------- FileReader | ----------------------- # H5µÄж«Î÷ ----------------------- FileReader-ÊôÐÔ | ----------------------- result * ½á¹û ----------------------- FileReader-·½·¨ | ----------------------- readAsBinaryString * ²ÎÊýfile ½«Îļþ¶ÁȡΪ¶þ½øÖƱàÂë readAsText * ²ÎÊý:file,[encoding] * ½«Îļþ¶ÁȡΪÎı¾ readAsDataURL * ²ÎÊý:file * ½«Îļþ¶ÁȡΪDataURL,Æäʵ¾ÍÊÇ Base64 ±àÂë abort * Öն˶ÁÈ¡²Ù×÷ ----------------------- FileReader-ʼþ | ----------------------- onabort * ÖÐ¶Ï onerror * ³ö´í onloadstart * ¿ªÊ¼ onprogress * ÕýÔÚ¶ÁÈ¡ onload * ³É¹¦¶ÁÈ¡ onloadend * ¶ÁÈ¡Íê³É£¬ÎÞÂ۳ɹ¦Ê§°Ü # event ÊôÐÔ/·½·¨ ----------------------- FileReader-demo | ----------------------- //¶ÁÈ¡±¾µØÎļþ²¢ÏÔʾ //»ñÈ¡Îļþ var file = document.getElementById("file").files[0]; var reader = new FileReader(); //´´½¨ FileReader ¶ÔÏó //Ìí¼Óʼþ reader.onload = function(e){ //»ñÈ¡µ½¶ÁÈ¡ºóµÄ½á¹û:this.result result.innerHTML = '' } reader.readAsDataURL(file); //¶ÁÈ¡Îļþ