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Stricter html string check #639

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6dccb7d
stricter html string check
wxiaoguang Jun 30, 2025
008d9d5
add test
wxiaoguang Jun 30, 2025
131ed6d
Update unescaped-html-literal.md
wxiaoguang Jun 30, 2025
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2 changes: 1 addition & 1 deletion docs/rules/unescaped-html-literal.md
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Expand Up @@ -8,7 +8,7 @@

Constructing raw HTML with string literals is error prone and may lead to security issues.

Instead use [`lit-html`](https://github.com/Polymer/lit-html)'s `html` tagged template literal to safely construct HTML literal strings. Alternatively, you can use document builder APIs like `document.createElement`.
Instead use [`lit-html`](https://github.com/Polymer/lit-html)'s `html` tagged template literal to safely construct HTML literal strings. Alternatively, you can implement your own `html` tagged template literal function, or use document builder APIs like `document.createElement`.

👎 Examples of **incorrect** code for this rule:

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2 changes: 1 addition & 1 deletion lib/rules/unescaped-html-literal.js
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Expand Up @@ -15,7 +15,7 @@ export default {
},

create(context) {
const htmlOpenTag = /^<[a-zA-Z]/
const htmlOpenTag = /^\s*<[a-zA-Z]/

return {
Literal(node) {
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10 changes: 10 additions & 0 deletions tests/unescaped-html-literal.js
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Expand Up @@ -57,6 +57,16 @@ ruleTester.run('unescaped-html-literal', rule, {
},
],
},
{
code: "const helloHTML = ` \n\t<div>Hello ${name}!</div>`",
parserOptions: {ecmaVersion: 2017},
errors: [
{
message: 'Unescaped HTML literal. Use html`` tag template literal for secure escaping.',
type: 'TemplateLiteral',
},
],
},
{
code: 'const helloHTML = foo`<div>Hello ${name}!</div>`',
parserOptions: {ecmaVersion: 2017},
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