contains() : Check if String Contains Substring

Summary

Check if a string contains a specified substring.

Signature

contains(str, search)

Parameters

Returns

Type: Boolean

true if the substring is found, false otherwise.

Examples

Simple Search

  <span class="badge-premium">Premium Product</span>

Data:

doc.Params["model"] = new {
    description = "This is a premium quality product"
};

Output:

<span class="badge-premium">Premium Product</span>

Filter Items

  
    <div class="product-pro">
      <h3></h3>
      <span>Professional Edition</span>
    </div>
  

Data:

doc.Params["model"] = new {
    products = new[] {
        new { name = "Widget" },
        new { name = "Widget Pro" },
        new { name = "Gadget Pro Max" }
    }
};

Output:

<div class="product-pro">
  <h3>Widget Pro</h3>
  <span>Professional Edition</span>
</div>
<div class="product-pro">
  <h3>Gadget Pro Max</h3>
  <span>Professional Edition</span>
</div>

Keyword Highlighting

  
    <div class="search-result">
      <h4></h4>
      <p></p>
    </div>
  

Email Validation

  <p>Email: </p>

  <p class="error">Invalid email format</p>

Data:

doc.Params["model"] = new {
    email = "user@example.com"
};

Output:

<p>Email: user@example.com</p>

Notes

• Case-sensitive by default
• Returns false if search string is not found
• Empty search string returns true
• For case-insensitive search, use with toLower(): contains(toLower(str), toLower(search))
• For position information, use indexOf()
• Returns false for null values

See Also

• indexOf Function
• startsWith Function
• endsWith Function
• toLower Function