[英]Disable an input with javascript. Checking the code
I'm doing a client side in javascript and html. 我正在用javascript和html做客户端。 I have a problem.
我有个问题。 I want to check if password and repeat password are the same.
我想检查密码和重复密码是否相同。 In that case I want to disable an input.
在那种情况下,我想禁用输入。 I saw some codes around but I don't understand why it doesn't work.
我看到了一些代码,但是我不明白为什么它不起作用。 Can you help me?
你能帮助我吗? Here is my HTML:
这是我的HTML:
<input class="form-control form-stacked last" name="repeatPassword" id="repeat" placeholder="Repeat password" type="password">
<input class="btn btn-beats btn-block btn-stacked" value="Sign up" onkeydown="enable()" id = "btnPlaceOrder" type="submit">
<input class="form-control form-stacked" name="password" id = "password" placeholder="Password" type="password" required="true">
And then here is my javascript function: 然后这是我的javascript函数:
var password = document.getElementById("password");
var repeat = document.getElementById("repeat");
function enable(){
if (password.value() == repeat.value()){
document.getElementById("btnPlaceOrder").disabled = false;
} else{
document.getElementById("btnPlaceOrder").disabled = true;
}
}
Just to be precise, I did the import of the javascript in my HTML 准确地说,我在HTML中导入了javascript
HTML: Add listeners to the password inputs, so the submit button fill change its state as the user types. HTML:将侦听器添加到密码输入中,因此,随着用户键入,提交按钮填充将更改其状态。
<input id="password" type="password" onkeyup="enable()">
<input id="repeat" type="password" onkeyup="enable()">
<input value="Sign up" id="btnPlaceOrder" type="submit">
JS JS
function enable(){
// the comparison returns true or false so no need for if/else
document.getElementById("btnPlaceOrder").disabled = password.value !== repeat.value;
}
Fiddle: http://jsfiddle.net/40vvL1em/ 小提琴: http : //jsfiddle.net/40vvL1em/
Well simply call your function in the onkeyup()
event of your repeat input. 好吧,只需在重复输入的
onkeyup()
事件中调用函数即可。
<input class="form-control form-stacked last" name="repeatPassword" id="repeat" placeholder="Repeat password" type="password" onkeyup="enable()">
And here's the JS function: 这是JS函数:
var password = document.getElementById("password").value;
var repeat = document.getElementById("repeat").value;
function enable(){
if (password === repeat){
document.getElementById("btnPlaceOrder").disabled = false;
}
else{
document.getElementById("btnPlaceOrder").disabled = true;
}
}
That should do it. 那应该做。
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