Handling Enter Key on Text Area using javascript

问题:

I have 5 text areas on a page and I would like a specific event to occur on hitting the enter key on the first text area and a different event on enter key of the other text areas. Can you please suggest on how this can be acheived.

<TextArea></TextArea> <TextArea></TextArea> <TextArea></TextArea> <TextArea></TextArea> <TextArea></TextArea> 

when hitting the enter on 1st Text Area, alert('Text Area 1 clicked');

when hitting the enter on the other 4 Text Area, alert ('Other Text Area's clicked');

Can this be acheived using jquery.

回答1:

http://jsfiddle.net/26kN7/1/

$("textarea").keyup(function(e) {    var code = e.keyCode ? e.keyCode : e.which;    if (code == 13) {  // Enter keycode      if($(this).hasClass("first")) {         alert("first ta clicked");      } else {          alert("the other ta clicked");      }    } }); 

in some versions of FFX pressing <Tab>, e.which isn't set (remains 0), but e.keyCode is (9).

you can also shorten this to

$("textarea").keyup(function(e){     if((e.keyCode || e.which) == 13) { //Enter keycode       if($(this).hasClass("first")) {         alert("first ta clicked");       } else {         alert("the other ta clicked");       }     } }); 

the other thing note is I like adding the class here than finding the first textarea is cos this is more generic solution and could cater to any of the textareas.

回答2:

You could try using:

$('textarea').keypress(     function(e){         if (e.keyCode == 13) {             if ($(this).index() == 0) {                 // code for first textarea;             }             else {                 // code for others             }         }     }); 

JS Fiddle demo.

回答3:

Check the which property of the jQuery event object to determine which key was pressed.

$('textarea').first().keypress(function (e) {     if (e.which === 13) alert('Text Area 1 enter key pressed'); }).nextAll().keypress(function (e) {     if (e.which === 13) alert('Other Text Area enter key pressed'); }); 

文章来源: Handling Enter Key on Text Area using javascript