JavaScript String bold(): Legacy Reference

String.prototype.bold() is a deprecated HTML-wrapper method retained for compatibility. Do not use it for new code. Use semantic HTML such as <strong>, CSS, or DOM APIs instead.

const text = "Important";
console.log(text.bold()); // legacy: <b>Important</b>

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Legacy bold() syntax Top ↑

string.bold()

The method returns an HTML string; it does not style the original JavaScript string object.

Legacy output Top ↑

const text = "Welcome to Plus2net";
const htmlText = text.bold();
console.log(htmlText);

Preferred semantic HTML Top ↑

If the text has strong importance, write <strong>Important</strong> directly in HTML.

Modern DOM approach Top ↑

const strong = document.createElement("strong");
strong.textContent = "Important";
document.body.append(strong);

Using textContent avoids interpreting the text itself as HTML.

Use CSS for visual boldness only Top ↑

.emphasis { font-weight: 700; }

Use CSS when the effect is visual rather than semantic.

Common mistakes Top ↑

Do not build user-supplied HTML with deprecated wrapper methods and then insert it with innerHTML. Prefer DOM creation and textContent.

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Subhendu Mohapatra

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I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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