Javascript onclick change variable value
16,556
Assuming mark-up like the following:
<div id="gallery">
<img class="people" data-subject="Steve Jobs" src="path/to/imageOfSteve.png" />
<img class="people" data-subject="Bill Gates" src="path/to/imageOfBill.png" />
</div>
<span id="caption"></span>
Then a relatively simple, and plain JavaScript, approach:
function identifySubject(image, targetEl) {
if (!image) {
return false;
}
else {
var targetNode = document.getElementById(targetEl) || document.getElementById('caption'),
person = image.getAttribute('data-subject');
text = document.createTextNode(person);
if (targetNode.firstChild.nodeType == 3) {
targetNode.firstChild.nodeValue = person;
}
else {
targetNode.appendChild(text);
}
}
}
var images = document.getElementsByClassName('people');
for (var i=0, len=images.length; i<len; i++) {
images[i].onclick = function(e){
identifySubject(this, 'caption');
};
}
Author by
TheShadowbyte
Updated on June 05, 2022Comments
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TheShadowbyte almost 2 years
I am new to JavaScript and I need some help. I am making a website and I have several images of team members that if clicked (so I'm guessing the onclick event) will change the variable values corresponding to that team member. For instance, if I click on a picture of Bill Gates, in a separate div, I need to have a variable (let's say Name) change value to Bill Gates. Then, if I click on an image of Steve Jobs, the variables containing Bill Gates' data will get overwritten with the data of Steve Jobs. How do I do this?
Thank you.
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TheShadowbyte over 11 yearsThank you, this works. It doesn't let me give +1 because I don't have 15 reputation but when it lets me, I'll do that. Everyone else as well, thank you.
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Sikshya Maharjan over 11 yearsYes, it's JavaScript, but it's worth mentioning that it does require the use of the jQuery library. Also, why
html()
and nottext()
? -
Sikshya Maharjan over 11 yearsIt works, certainly but good luck maintaining that code and updating the function calls when (and not 'if') you want to change and update the functionality.
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jtheman over 11 yearssure, true about jQuery. Well use of html is because if user wants to include markup data it should work. Also note that CSS should set the span elements to display="none"