$(document).keydown(function (event) {
      //proper indentiation of keycode and which to be equal to 13.
    if ( (event.keyCode || event.which) === 13) {
        // Cancel the default action, if needed
        event.preventDefault();
        //call function, trigger events and everything tou want to dd . ex : Trigger the button element with a click
        $("#btnsearch").trigger('click');
    }
});

我无法使Paolo Bergan蒂诺发布的代码正常工作，但当我将其更改为$（document）和e.which而不是e.keyCode时，我发现它工作得很完美。

$(document).keypress(function(e) {
    if(e.which == 13) {
        alert('You pressed Enter!');
    }
});

链接到JS Bin上的示例

$(document).keyup(function(e) {
    if(e.key === 'Enter') {
        //Do the stuff
    }
});

$(document).keydown(function (event) {
      //proper indentiation of keycode and which to be equal to 13.
    if ( (event.keyCode || event.which) === 13) {
        // Cancel the default action, if needed
        event.preventDefault();
        //call function, trigger events and everything tou want to dd . ex : Trigger the button element with a click
        $("#btnsearch").trigger('click');
    }
});

有一个keypress（）事件方法。Enter键的ASCII编号为13，不取决于使用的浏览器。

使用event.key和现代JavaScript！

$(document).keypress(function(event) {
    if (event.key === "Enter") {
        // Do something
    }
});

或不使用jQuery：

document.addEventListener("keypress", function onEvent(event) {
    if (event.key === "Enter") {
        // Do something better
    }
});

Mozilla文档

支持的浏览器