feat: quoteStyle option

lib/index.d.ts

@@ -24,6 +24,20 @@ declare namespace render {
      * @default true
      */
     quoteAllAttributes: boolean;
+
+    /**
+     * Quote style
+     *
+     * 0 - Smart quotes
+     *   <img src="https://example.com/example.png" onload='testFunc("test")'>
+     * 1 - Single quotes
+     *   <img src='https://example.com/example.png' onload='testFunc("test")'>
+     * 2 - double quotes
+     *   <img src="https://example.com/example.png" onload="testFunc("test")">
+     *
+     * @default 2
+     */
+    quoteStyle: 0 | 1 | 2
   };
 
   // PostHTML Tree

lib/index.js

@@ -59,12 +59,17 @@ function render(tree, options) {
     replaceQuote = true;
   }
 
+  let {quoteStyle} = options;
+  if (quoteStyle === undefined) {
+    quoteStyle = 2;
+  }
+
   return html(tree);
 
   /** @private */
   function isSingleTag(tag) {
     if (singleRegExp.length > 0) {
-      return singleRegExp.some(reg => reg.test(tag))
+      return singleRegExp.some(reg => reg.test(tag));
     }
 
     if (!singleTags.includes(tag)) {
@@ -87,7 +92,7 @@ function render(tree, options) {
             attrValue = object[key].replace(/"/g, '"');
           }
 
-          attr += ' ' + key + '="' + attrValue + '"';
+          attr += makeAttr(key, attrValue, quoteStyle);
         } else if (object[key] === '') {
           attr += ' ' + key;
         } else {
@@ -96,7 +101,7 @@ function render(tree, options) {
       } else if (object[key] === true) {
         attr += ' ' + key;
       } else if (typeof object[key] === 'number') {
-        attr += ' ' + key + '="' + object[key] + '"';
+        attr += makeAttr(key, object[key], quoteStyle);
       }
     }
 
@@ -112,6 +117,26 @@ function render(tree, options) {
     }
   }
 
+  /** @private */
+  function makeAttr(key, attrValue, quoteStyle = 1) {
+    if (quoteStyle === 1) {
+      // Single Quote
+      return ` ${key}='${attrValue}'`;
+    }
+
+    if (quoteStyle === 2) {
+      // Double Quote
+      return ` ${key}="${attrValue}"`;
+    }
+
+    // Smart Quote
+    if (attrValue.includes('"')) {
+      return ` ${key}='${attrValue}'`;
+    }
+
+    return ` ${key}="${attrValue}"`;
+  }
+
   /**
    * HTML Stringifier
    *
@@ -129,10 +154,10 @@ function render(tree, options) {
     traverse(tree, node => {
       // Undefined, null, '', [], NaN
       if (node === undefined ||
-          node === null ||
-          node === false ||
-          node.length === 0 ||
-          Number.isNaN(node)) {
+        node === null ||
+        node === false ||
+        node.length === 0 ||
+        Number.isNaN(node)) {
         return;
       }
 

readme.md

@@ -89,6 +89,7 @@ const html = render(tree, options)
 |**[`closingSingleTag`](#closingSingleTag)**|`{String}`|[`>`](#default)|Specify the single tag closing format|
 |**[`quoteAllAttributes`](#quoteAllAttributes)**|`{Boolean}`|[`true`](#default)|Put double quotes around all tags, even when not necessary.|
 |**[`replaceQuote`](#replaceQuote)**|`{Boolean}`|[`true`](#default)|Replaces quotes in attribute values with `&quote;`.|
+|**[`quoteStyle`](#quoteStyle)**|`{0|1|2}`|[`2`](#default)|Specify the style of quote arround the attribute values|
 
 ### `singleTags`
 
@@ -200,6 +201,33 @@ Replaces quotes in attribute values with `&quote;`.
 <img src="<?php echo $foo["bar"] ?>">
 ```
 
+### `quoteStyle`
+
+##### `2 (Default)`
+
+Attribute values are wrapped in double quotes:
+
+```html
+<img src="https://example.com/example.png" onload="testFunc("test")">
+```
+
+##### `1`
+
+Attribute values are wrapped in single quote:
+
+```html
+<img src='https://example.com/example.png' onload='testFunc("test")'>
+```
+
+##### `0`
+
+Quote style is based on attribute values (an alternative for `replaceQuote` option):
+
+```html
+<img src="https://example.com/example.png" onload='testFunc("test")'>
+```
+
+
 [npm]: https://img.shields.io/npm/v/posthtml-render.svg
 [npm-url]: https://npmjs.com/package/posthtml-render
 

test/render.test.js

@@ -371,5 +371,37 @@ describe('PostHTML Render', () => {
         expect(render(fixture, options)).to.eql(expected);
       });
     });
+
+    describe('quoteStyle', () => {
+      it('1 - single quote', () => {
+        const options = {replaceQuote: false, quoteStyle: 1};
+
+        const fixture = {tag: 'img', attrs: {src: 'https://example.com/example.png', onload: 'testFunc("test")'}};
+        const expected = '<img src=\'https://example.com/example.png\' onload=\'testFunc("test")\'>';
+
+        fs.writeFileSync('test.html', render(fixture, options));
+        expect(render(fixture, options)).to.eql(expected);
+      });
+
+      it('2 - double quote', () => {
+        const options = {replaceQuote: false, quoteStyle: 2};
+
+        const fixture = {tag: 'img', attrs: {src: 'https://example.com/example.png', onload: 'testFunc("test")'}};
+        const expected = '<img src="https://example.com/example.png" onload="testFunc("test")">';
+
+        fs.writeFileSync('test.html', render(fixture, options));
+        expect(render(fixture, options)).to.eql(expected);
+      });
+
+      it('0 - smart quote', () => {
+        const options = {replaceQuote: false, quoteStyle: 0};
+
+        const fixture = {tag: 'img', attrs: {src: 'https://example.com/example.png', onload: 'testFunc("test")'}};
+        const expected = '<img src="https://example.com/example.png" onload=\'testFunc("test")\'>';
+
+        fs.writeFileSync('test.html', render(fixture, options));
+        expect(render(fixture, options)).to.eql(expected);
+      });
+    });
   });
 });