How to use if statements in Underscore.js templates ?
Last Updated :
18 Jan, 2023
Underscore.js is a javascript library that provides helper functions in functional programming without extending the built-in objects. This package consists of 100 functions like map, filter, etc.
We can install this by using npm.
npm install underscore
Syntax:
const _ = require('underscore');
Approach:
- Write your markup code regarding the requirement.
- We should always place the underscore.js code inside the <script> tag.
- In this case, Write the if and else logic based upon a problem statement.
- Once the code is error-free we can surf the file as usual.
- In this way, we need to write the code in <script> tag;
Example: This example shows the use of the above-explained approach.
html
<!DOCTYPE html>
< html >
< head >
< script type = "text/javascript"
src =
</ script >
</ head >
< body >
< script type = "text/javascript" >
<% if (typeof (number) != "undefined") {%>
< span class = "number" ><%= number %></ span >
<%}
else {
print("Number doesn't exist");
} %>
</ script >
</ body >
</ html >
|
Output:
Number doesn't exist
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