I need to get all the input
objects and manipulate the onclick
param.
The following does the job for <a>
links. Looking for something like this for input
tags.
for (var ls = document.links, numLinks = ls.length, i=0; i<numLinks; i++){ var link = unescape(ls[i].href); link = link.replace(/\\'/ig,"#"); if(ls[i].href.indexOf("javascript:") == -1) { ls[i].href = "javascript:LoadExtern(\\""+link+"\\",\\"ControlPanelContent\\",true,true);"; } }
(See update at end of answer.)
You can get a NodeList
of all of the input
elements via getElementsByTagName
(DOM specification, MDC, MSDN), then simply loop through it:
var inputs, index; inputs = document.getElementsByTagName('input'); for (index = 0; index < inputs.length; ++index) { // deal with inputs[index] element. }
There I've used it on the document
, which will search the entire document. It also exists on individual elements (DOM specification), allowing you to search only their descendants rather than the whole document, e.g.:
var container, inputs, index; // Get the container element container = document.getElementById('container'); // Find its child `input` elements inputs = container.getElementsByTagName('input'); for (index = 0; index < inputs.length; ++index) { // deal with inputs[index] element. }
...but you've said you don't want to use the parent form
, so the first example is more applicable to your question (the second is just there for completeness, in case someone else finding this answer needs to know).
Update: getElementsByTagName
is an absolutely fine way to do the above, but what if you want to do something slightly more complicated, like just finding all of the checkboxes instead of all of the input
elements?
That's where the useful querySelectorAll
comes in: It lets us get a list of elements that match any CSS selector we want. So for our checkboxes example:
var checkboxes = document.querySelectorAll("input[type=checkbox]");
You can also use it at the element level. For instance, if we have a div
element in our element
variable, we can find all of the span
s with the class foo
that are inside that div
like this:
var fooSpans = element.querySelectorAll("span.foo");
querySelectorAll
and its cousin querySelector
(which just finds the first matching element instead of giving you a list) are supported by all modern browsers, and also IE8.
querySelectorAll returns a NodeList which has its own forEach method:
document.querySelectorAll('input').forEach( input => { // ... });
getElementsByTagName now returns an HTMLCollection instead of a NodeList. So you would first need to convert it to an array to have access to methods like map and forEach:
Array.from(document.getElementsByTagName('input')).forEach( input => { // ... });
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