the following is working fine:
document.getElementById("comment").style.background=color
I'd like to add several IDs. The following do not work:
document.getElementById("comment, name, url").style.background=color
document.querySelectorAll("comment, name, url").style.background=color
Can someone suggest what code avoiding to write a new function to bind all the ids?
EDIT: This is the code I am working on: On the header I have:
<script>
function setbg(color)
{
document.getElementById("comment").style.background=color
}
</script>
And it styles well the following textarea:
<p><textarea name="comment" id="comment" cols="100%" rows="10" tabindex="4" required="" title="Mandatory field" onfocus="this.value=''; setbg('#e5fff3');" onblur="setbg('white')" placeholder="Add a comment here..." style="background-color: white; background-position: initial initial; background-repeat: initial initial;"></textarea></p>
But I'd like it to work also for:
<input type="text" name="url" id="url" value="" size="22" tabindex="3" placeholder="WWW" onfocus="this.value=''; setbg('#e5fff3');" onblur="setbg('white')">
As well as per other fields, like email, name, etc.
Create, and use, a function:
function colorElement(id, color){
document.getElementById(id).style.backgroundColor = color;
}
colorElement('comment', 'red');
colorElement('name', 'green');
colorElement('url', 'blue');
Or you can use an array of element id
s:
['comment', 'name', 'url'].forEach(function(a){
document.getElementById(a).style.backgroundColor = 'red';
});
Or, as a development of the previous (which allows you to set different colours):
[{
"id": "comment",
"color": "red"
}, {
"id": "name",
"color": "green"
}, {
"id": "url",
"color": "blue"
}].forEach(function (a) {
document.getElementById(a.id).style.backgroundColor = a.color;
});
Since you tagged jQuery, here's a way:
$("#comment, #name, #url").css("background-color",color);
This grabs multiple ids, and applies the style to them.
The getElementById
method can only get one element, so you would need to use it on each id:
var ids = ["comment", "name", "url"];
for (i in ids) {
document.getElementById(ids[i]).style.background = color;
}
The querySelectorAll
takes a selector, so you would need to prefix each id with #
, then you need to loop through the result as you can only set a property on one element at a time:
var el = document.querySelectorAll("#comment, #name, #url");
for (i in el) {
el[i].style.background = color;
}
Another approach is create an array of ID's and loop over array
var els=["comment", "name", "url"];
while (els.length){
document.getElementById(els.pop()).style.backgroundColor = color;
}
Either you can iterate with array of element name like
for(var i=0; i<3; i++)
{
document.getElementById(array[i]).style.background=color;
}
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