JavaScript String strike() Method

Beginner
5 min read
Updated: Nov 2026
3 examples
Method
Decorative image with the word STRIKE

Definition

String.prototype.strike() is a legacy HTML wrapper that returns a new string wrapping your text in <strike>…</strike>. It takes no parameters and never mutates the original string.

Pass the required arguments shown below. Check return values and browser support before you rely on the result.

Syntax

Call string.strike. Start with this line.

JavaScript
string.strike()
CallWhat it does
string.strike()Primary signature.
string.strike(...)Call with the arguments your case needs.

Built into JavaScript. Call strike(...) on a string (or String instance) — no import required.

Library declarations
JavaScript
string.strike()

Parameters

This member has no parameters beyond those shown in the signature.

Return Value

Return ValueDescription
*HTML string with obsolete <strike> tags

JavaScript Examples

Example 1 — Basic Wrap

Call strike() to build the classic (obsolete) <strike> HTML string.

JavaScript
const text = "Hello, world";

console.log(text.strike());
// "<strike>Hello, world</strike>"
Try It Yourself

How It Works

  1. Start with text. "Hello, world" is a normal string.
  2. Call strike(). No arguments — the method wraps the whole string.
  3. Get HTML markup. The return value is "<strike>Hello, world</strike>".
  4. Original stays put. text is still "Hello, world".

Example 2 — Empty String & Special Characters

See empty wrappers and that < is not escaped.

JavaScript
console.log("".strike());       // "<strike></strike>"
console.log("A < B".strike());  // "<strike>A < B</strike>"
console.log(typeof "x".strike()); // "string"
Try It Yourself

How It Works

  1. Empty input. "".strike() still wraps tags around nothing → "<strike></strike>".
  2. No escaping. "A < B" keeps the < character inside the markup.
  3. Type is string. You get text, not a live DOM element.
  4. Safety tip. Never feed untrusted input through strike() into innerHTML.

Example 3 — Prefer DOM / CSS Instead

Compare the legacy wrapper with modern createElement("s") and CSS.

JavaScript
// Legacy — do not use in new code
console.log("old price".strike());
// "<strike>old price</strike>"

// Prefer a real <s> element
const el = document.createElement("s");
el.textContent = "old price";
console.log(el.outerHTML);
// "<s>old price</s>"

// Look-only alternative
const styled = document.createElement("span");
styled.textContent = "old price";
styled.style.textDecoration = "line-through";
console.log(styled.style.textDecoration); // "line-through"
Try It Yourself

How It Works

  1. Legacy path. "old price".strike() builds obsolete <strike> markup.
  2. Create a real element. createElement("s") + textContent is the safe DOM approach.
  3. Look-only strikethrough. CSS text-decoration: line-through needs no special tag.
  4. Rule of thumb. Learn strike() to read old code; ship <s>/<del>/CSS for new UI.
Compatibility

Browser & Runtime Support

String.prototype.strike() is still implemented widely for compatibility, but it is deprecated. Do not use it in new projects.

✓ Deprecated · Legacy

String.prototype.strike()

Available in major browsers and Node.js for legacy compatibility. Prefer DOM APIs or CSS text-decoration in new code.

Legacy Compatibility only
Google Chrome Supported · Legacy API
Legacy support
Mozilla Firefox Supported · Legacy API
Legacy support
Apple Safari Supported · Legacy API
Legacy support
Microsoft Edge Supported · Legacy API
Legacy support
Internet Explorer Supported · Legacy
Legacy support
Opera Supported · Legacy API
Legacy support
Samsung Internet Supported · Android
Legacy support
Bun Supported · JavaScript runtime
Supported
Deno Supported · JavaScript runtime
Supported
Node.js Supported · Server runtime
Supported
Android WebView Supported · Modern WebView
Legacy support
strike() Avoid in new code

Bottom line: Recognize strike() when reading old code. For new UI, use createElement("s") / "del" or CSS text-decoration: line-through — never ship obsolete <strike> strings from string methods.

Frequently Asked Questions

strike() returns a new HTML string that wraps the text in a <strike> element — for example "Hello".strike() returns "<strike>Hello</strike>". It takes no parameters and does not change the original string.
Yes. MDN marks all HTML wrapper methods as deprecated. The <strike> element itself was also removed from the HTML specification. Prefer <s> or <del> created with document.createElement(), or CSS text-decoration: line-through.
Use <s> for content that is no longer accurate or relevant, and <del> for deleted content (often with edit history). For look-only strikethrough, use CSS text-decoration: line-through.
No. Strings are immutable. strike() returns a new string containing HTML markup. The original text stays the same.
Use document.createElement("s") or createElement("del"), set textContent, and append the element. Or apply CSS text-decoration: line-through without building HTML strings.
It remains widely available for compatibility, but you should not use it in new code. Prefer DOM APIs or CSS.

Next: sub()

Another deprecated HTML wrapper — this one builds <sub> markup from a string.

sub() tutorial →

About the author

Mari Selvan M P
Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

  • Experience 12 years building web and cloud systems
  • Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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