There are 3 paragraphs of text on a page...I am looking to dynamically change the font size of these paragraphs every 3 seconds....is that feasible?
Specifically, I want paragraph 1 to be initially displayed at 10px and paragraph 2 at 8px. Then, after 3 seconds, I would like paragraph 2 to switch to 10px while paragraph 1 switches to 8px.
Is there a way to achieve this using an update panel or JavaScript? Any suggestions?
To automate the execution of a function periodically, utilize the setInterval method:
CSS:
#para1 { font-szie: 10px; }
#para2 { font-szie: 8px; }
#para3 { font-szie: 8px; }
HTML:
<p id="para1">asdf</p>
<p id="para2">asdf</p>
<p id="para3">asdf</p>
Javascript:
window.onload = function(){
var current = 0;
var ids = ['para1', 'para2', 'para3'];
window.setInterval(function(){
current = (current + 1) % 3;
for (var i = 0; i < ids.length; i++) {
document.getElementById(ids[i]).style.fontSize = (i == current ? '10px' : '8px');
}
}, 3000);
};
Give this a try:
<div>
<p id="p1">Paragraph 1 </p>
<p id="p2">Paragraph 2 </p>
</div>
$(function() {
var size1 = 20, size2 = 8, tempSize;
$('#p1').css('fontSize', size1);
$('#p2').css('fontSize', size2);
function changeFontSize() {
tempSize = size1;
size1 = size2;
size2 = tempSize;
$('#p1').css('fontSize', size1);
$('#p2').css('fontSize', size2);
}
setInterval(changeFontSize, 3000);
});
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