3. VTU WEB TECHNOLOGY LAB | READ NOW
VTU WEB TECHNOLOGY LAB
3] WRITE A JAVASCRIPT CODE THAT DISPLAYS TEXT “TEXT-GROWING” WITH INCREASING FONT SIZE IN THE INTERVAL OF 100MS IN RED COLOR, WHEN THE FONT SIZE REACHES 50PT IT DISPLAYS “TEXT-SHRINKING” IN BLUE COLOR. THEN THE FONT SIZE DECREASES TO 5PT
STEPS TO EXECUTE HTML PROGRAM
- Copy the html code given below
- Save it with .html file name extension
- Click double click on your saved html file
- Exection successfull
Solution 1 – [prog3.html]
<!DOCTYPE html>
<html>
<body>
<div id="h"></div>
<script>
var v = 0, f = 1,t="TEXT-GROWING",color;
function a()
{
if(f==1)
v+=5,color="red";
else
v-=5,color="blue";
document.getElementById("h").innerHTML = "<h1 style=\"font-size: "+v+"px ; margin: 0px; color : "+color+"\"><b> "+t+"</b></h1>";
if(v==50)
f = 0, t="TEXT-SHRINKING";
if(v==5)
f = 1, t="TEXT-GROWING";
c();
}
function c()
{
setTimeout(a,300);
}
c();
</script>
</body>
</html>
WEB TECHNOLOGY – Output
WEB TECHNOLOGY Solution 2 – [prog3.html]
<!DOCTYPE HTML>
<html>
<head>
<style>
p {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
</style>
</head>
<body>
<p id="demo"></p>
<script>
var var1 = setInterval(inTimer, 1000);
var fs = 5;
var ids = document.getElementById("demo");
function inTimer() {
ids.innerHTML = 'TEXT GROWING';
ids.setAttribute('style', "font-size: " + fs + "px; color: red");
fs += 5;
if(fs >= 50 ){
clearInterval(var1);
var2 = setInterval(deTimer, 1000);
}
}
function deTimer() {
fs -= 5;
ids.innerHTML = 'TEXT SHRINKING';
ids.setAttribute('style', "font-size: " + fs + "px;
color: blue"); if(fs === 5 ){
clearInterval(var2);
}
}
</script>
</body>
</html>
