Skip to main content

Typing Text Effect In Javascript

Most of the time we need to create a effect just like typing text in web page but don't know how to do such task through javascript.
 
This article is for creating typing effect for given text through javascript, below is auto started, manual through started through button click demo is given below.

Demo Text :
Typing Text Effect In Javascript Hey! This is a demo article only for showing how typing text works, through javascript.

You can simply use this code by adding this javascript code and place your html as the given place or you can add more block like this just to need create more instance of TypingText Class.




<script type="text/javascript">

/****Class Defination****/
function TypingText (element, interval, cursor, finishedCallback) {
    if ((typeof document.getElementById == "undefined") || (typeof element.innerHTML == "undefined")) {
        this.running = true;
        return;
    }
    this.element = element;
    this.finishedCallback = (finishedCallback ? finishedCallback : function () { return; });
    this.interval = (typeof interval == "undefined" ? 100 : interval);
    this.origText = this.element.innerHTML;
    this.unparsedOrigText = this.origText;
    this.cursor = (cursor ? cursor : "");
    this.currentText = "";
    this.currentChar = 0;
    this.element.typingText = this;
    if (this.element.id == "") this.element.id = "typingtext" + TypingText.currentIndex++;
    TypingText.all.push(this);
    this.running = false;
    this.inTag = false;
    this.tagBuffer = "";
    this.inHTMLEntity = false;
    this.HTMLEntityBuffer = "";
}


/**** Static Valiables ****/
TypingText.all = new Array();
TypingText.currentIndex = 0;


/*** Static Fuction Add ***/
TypingText.runAll = function () {
    for (var i = 0; i < TypingText.all.length; i++) TypingText.all[i].run();
}

/*** Instance Fuction Add ***/
TypingText.prototype.run = function () {
    if (this.running) return;
    if (typeof this.origText == "undefined") {
        setTimeout("document.getElementById('" + this.element.id + "').typingText.run()", this.interval);
        return;
    }
    if (this.currentText == "") this.element.innerHTML = "";
    if (this.currentChar < this.origText.length) {
        if (this.origText.charAt(this.currentChar) == "<" && !this.inTag) {
            this.tagBuffer = "<";
            this.inTag = true;
            this.currentChar++;
            this.run();
            return;
        } else if (this.origText.charAt(this.currentChar) == ">" && this.inTag) {
            this.tagBuffer += ">";
            this.inTag = false;
            this.currentText += this.tagBuffer;
            this.currentChar++;
            this.run();
            return;
        } else if (this.inTag) {
            this.tagBuffer += this.origText.charAt(this.currentChar);
            this.currentChar++;
            this.run();
            return;
        } else if (this.origText.charAt(this.currentChar) == "&" && !this.inHTMLEntity) {
            this.HTMLEntityBuffer = "&";
            this.inHTMLEntity = true;
            this.currentChar++;
            this.run();
            return;
        } else if (this.origText.charAt(this.currentChar) == ";" && this.inHTMLEntity) {
            this.HTMLEntityBuffer += ";";
            this.inHTMLEntity = false;
            this.currentText += this.HTMLEntityBuffer;
            this.currentChar++;
            this.run();
            return;
        } else if (this.inHTMLEntity) {
            this.HTMLEntityBuffer += this.origText.charAt(this.currentChar);
            this.currentChar++;
            this.run();
            return;
        } else {
            this.currentText += this.origText.charAt(this.currentChar);
        }
        this.element.innerHTML = this.currentText;
        this.element.innerHTML += (this.currentChar < this.origText.length - 1 ? (typeof this.cursor == "function" ? this.cursor(this.currentText) : this.cursor) : "");
        this.currentChar++;
        setTimeout("document.getElementById('" + this.element.id + "').typingText.run()", this.interval);
    } else {
        this.currentText = "";
        this.currentChar = 0;
        this.running = false;
        this.finishedCallback();
    }
}
</script>



<div id="divTypingtext">
    <%--Place your text here--%>
</div>

<p id="pTypingtext">
    <%--Place your text here--%>
</p>


<input type="button" id="btnShow" onclick='TypingText.runAll();' value="Start Typing Text"/>
 



<script type="text/javascript">
  
new TypingText(document.getElementById("divTypingtext"), 100, "_", TaskCompleted1);
  
new TypingText(document.getElementById("pTypingtext"), 100, function (i) { var ar = new Array("_", " "); return " " + ar[i.length % ar.length]; }, TaskCompleted2);

function TaskCompleted1() {
    alert("Task 1 Completed")
}
function TaskCompleted2() {
    alert("Task 2 Completed")
}
</script>
Here you can also use manual cursor as you want, just to change the function of cursor some manual cursor function given below.

function (i) { var ar = new Array("_", " "); return " " + ar[i.length % ar.length]; }

Popular posts from this blog

Uploading large file in chunks in Asp.net Mvc c# from Javascript ajax

Often we have a requirement to upload files in Asp.net, Mvc c# application but when it comes to uploading larger file, we always think how to do it as uploading large file in one go have many challenges like UI responsiveness, If network fluctuate for a moment in between then uploading task get breaks and user have to upload it again etc.

What is NameSpace in .Net

This a basic question which allways asked in the interview that what is the namespace ,do you know about namespace,can you tell me some words about namespace.

How to handle click event of linkbutton inside gridview

Recently I have posted how to sort only current page of gridview, Scrollble gridview with fixed header through javascript, File upload control inside gridview during postback and now i am going to explain how to handle click event of linkbutton or any button type control inside gridview.

We can handle click event of any button type control inside gridview by two way first is through event bubbling and second one is directly (in this type of event handling we need to access current girdviewrow container)

Scrollable Gridview with fixed headers in asp.net

horizontal and vertical scrollable Gridview with static header row.fixed header in gridview in asp.net.static header in gridview through java script.I was looking for a solution for this for a long time and found most of the answers are not working or not suitable for my situation i also find most of the java script code for that they worked but only with the vertical scroll not with the horizontal scroll and also combination of header and rows doesn't match.

how $document.ready() is different from window.onload()

we often use window.onload() in javascript and $document.ready() in jquery and assume that both are same just jquery library wrap up javascript window.onload() and introduce $document.ready() but no there is much difference between them below is the explanation -