按照老師這樣書寫報錯了。提示Uncaught TypeError: Failed to execute 'setAttribute' on 'Element': 2 arguments required, but only 1 present. at HTMLInputElement.pwd1.onkeyup
pwd1.onkeyup = function(){
// 大與5個字符為“中”
if(this.value.length > 5){
em[1].className = "active";
pwd2.removeAttribute("disabled");
pwd2_msg.style.display = "block";
}else{
em[1].className = "";
pwd2.setAttribute("disabled");
pwd2_msg.style.display = "none";
}
// 大與10個字符為“強”
if(this.value.length > 10){
em[2].className = "active";
}else{
em[2].className = "";
}
}
2018-08-21
需要給一個值，這個值可以是''也行pwd2.setAttribute("disabled",'');像這樣
2019-02-22
setAttribute（屬性名稱，屬性值）都是必不可少的兩者