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JavaScript: Replace text of an HTML element without using Id property

, 22 Aug 2013 CPOL
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Replace text of an HTML element without using Id property.

I got a situation where I have to replace a HTML text in production environment, which is getting generated dynamically from back-end C# code and I have to do this without rebuilding and redeploying the dlls.

I wanted to do this the simplest way, by just deploying the aspx page and replacing the content using JavaScript as show in the example below:

I need to replace a heading which is in <h2>...</h2>tag:

<h2>Test - 1</h2>
<h2>Test - 2</h2>
<h2>Test - 3</h2> 

I have to replace "Test - 3" to "Test - 5". As I know the it is the 3rd <h2> element, I used the below JavaScript code:

var string = document.getElementsByTagName("h2")[2].innerHTML;
var replacedString = string.replace("Test - 3", "Test - 5");
document.getElementsByTagName("h2")[2].innerHTML = replacedString; 
This can also be accomplished alternatively by going through all the <h2> elements one by one and replace the  matching text using an if condition.

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Srinivas Kalabarigi
Software Developer (Senior)
India India

Around 8 years of software development experience and involved in analysis, design, development, testing and deployment of enterprise web applications for government, healthcare and banking domain with good exposure to object-oriented design, software architectures, design patterns, test-driven development and agile practices.

 
Educational Background
  • Post Graduation in Computer Science from Andhra University, India.
  • Graduation in Mathematics, Electronics and Computer Science from Andhra University, India.
  • Diploma in Software Technology from CMC Ltd., India.

Comments and Discussions

 
GeneralMy vote of 5 PinprofessionalAntariksh Verma22-Aug-13 21:15 
GeneralRe: My vote of 5 PinprofessionalSrinivas Kalabarigi26-Aug-13 9:22 

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