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2023-12-14 06:00:02

防止在输入键时提交表单

我有一个带有两个文本框的表单，一个选择下拉框和一个单选按钮。当按下enter键时，我想调用JavaScript函数，但当我按下它时，表单就提交了。

当按下回车键时，如何防止表单被提交?

当前回答

使用TypeScript，避免多次调用该函数

let el1= <HTMLInputElement>document.getElementById('searchUser');
el1.onkeypress = SearchListEnter;

function SearchListEnter(event: KeyboardEvent) {
    if (event.which !== 13) {
        return;
    }
    // more stuff
}
2018-03-14 21:18:12

其他回答

我使用了document on，它涵盖了页面加载后动态添加的html:

  $(document).on('keydown', '.selector', function (event) {
    if (event.which == 13 || event.keyCode == 13) {
      //do your thang
    }
  });

增加来自@Bradley4的更新

2022-01-01 04:55:06

下面是如何使用JavaScript来完成它:

//in your **popup.js** file just use this function var input = document.getElementById("textSearch"); input.addEventListener("keyup", function(event) { event.preventDefault(); if (event.keyCode === 13) { alert("yes it works,I'm happy "); } }); <!--Let's say this is your html file--> <!DOCTYPE html> <html> <body style="width: 500px"> <input placeholder="Enter the text and press enter" type="text" id="textSearch"/> <script type="text/javascript" src="public/js/popup.js"></script> </body> </html>

2018-06-16 23:04:39 
<div class="nav-search" id="nav-search">
        <form class="form-search">
            <span class="input-icon">
                <input type="text" placeholder="Search ..." class="nav-search-input" id="search_value" autocomplete="off" />
                <i class="ace-icon fa fa-search nav-search-icon"></i>
            </span>
            <input type="button" id="search" value="Search" class="btn btn-xs" style="border-radius: 5px;">
        </form>

</div>

<script type="text/javascript">
    $("#search_value").on('keydown', function(e) {
        if (e.which == 13) {
             $("#search").trigger('click');
            return false;
        }
    });
    $("#search").on('click',function(){
        alert('You press enter');
    });
</script>
2017-08-28 04:41:38

原生js(获取api)

document.onload = (() => { alert('ok'); let keyListener = document.querySelector('#searchUser'); // keyListener.addEventListener('keypress', (e) => { if(e.keyCode === 13){ let username = e.target.value; console.log(`username = ${username}`); fetch(`https://api.github.com/users/${username}`,{ data: { client_id: 'xxx', client_secret: 'xxx' } }) .then((user)=>{ console.log(`user = ${user}`); }); fetch(`https://api.github.com/users/${username}/repos`,{ data: { client_id: 'xxx', client_secret: 'xxx' } }) .then((repos)=>{ console.log(`repos = ${repos}`); for (let i = 0; i < repos.length; i++) { console.log(`repos ${i} = ${repos[i]}`); } }); }else{ console.log(`e.keyCode = ${e.keyCode}`); } }); })(); <input _ngcontent-inf-0="" class="form-control" id="searchUser" placeholder="Github username..." type="text">

2017-06-10 12:16:10

下面的代码将在整个页面上添加ENTER键监听器。

这在带有单个操作按钮的屏幕中非常有用，例如登录，注册，提交等。

<head>
        <!--Import jQuery IMPORTANT -->
        <script src="https://code.jquery.com/jquery-2.1.1.min.js"></script>

         <!--Listen to Enter key event-->
        <script type="text/javascript">

            $(document).keypress(function (e) {
                if (e.which == 13 || event.keyCode == 13) {
                    alert('enter key is pressed');
                }
            });
        </script>
    </head>

已在所有浏览器上测试。

2016-12-14 07:40:15

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