在用户定义的函数中使用event.preventDefault()

<form onsubmit="userFunction(event)"> ...

函数userFunction (ev) ｛ 如果(! event.target.send.checked) ｛ console.log('form NOT submit on "Enter" key') ev.preventDefault (); ｝ ｝ 打开chrome控制台>网络选项卡查看 <form onsubmit="userFunction(event)" action="/test.txt"> . <input placeholder="type and press Enter" /><br> . <input type="checkbox" name="send" /> submit on enter > < /形式

事件。键=== "Enter"

使用event.key。不再有任意的数字代码!

注意:旧属性(。keyCode和.which)已弃用。

const node = document.getElementsByClassName("mySelect")[0];
node.addEventListener("keydown", function(event) {
    if (event.key === "Enter") {
        event.preventDefault();
        // Do more work
    }
});

现代风格，有lambda和解构

node.addEventListener("keydown", ({key}) => {
    if (key === "Enter") // Handle press
})

Mozilla文档

支持的浏览器

<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>

整个文档按下回车键:

$(document).keypress(function (e) {
    if (e.which == 13) {
        alert('enter key is pressed');
    }
});

http://jsfiddle.net/umerqureshi/dcjsa08n/3/

<form id="form1" runat="server" onkeypress="return event.keyCode != 13;">

在HTML页面中添加此代码…它会使……输入按钮. .

因此，覆盖尽可能多的浏览器的最佳解决方案可能是

if (event.which === 13 || event.keyCode === 13 || event.key === "Enter")