freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-an.../intermediate-algorithm-scri.../convert-html-entities.md

1.7 KiB

id title challengeType forumTopicId dashedName
a6b0bb188d873cb2c8729495 转换 HTML 字符实体 5 16007 convert-html-entities

--description--

请将字符串中的 &<>"(双引号)和 '(单引号)转换为相应的 HTML 字符实体。

--hints--

convertHTML("Dolce & Gabbana") 应返回 Dolce &amp; Gabbana

assert.match(convertHTML('Dolce & Gabbana'), /Dolce &amp; Gabbana/);

convertHTML("Hamburgers < Pizza < Tacos") 应返回 Hamburgers &lt; Pizza &lt; Tacos

assert.match(
  convertHTML('Hamburgers < Pizza < Tacos'),
  /Hamburgers &lt; Pizza &lt; Tacos/
);

convertHTML("Sixty > twelve") 应返回 Sixty &gt; twelve

assert.match(convertHTML('Sixty > twelve'), /Sixty &gt; twelve/);

convertHTML('Stuff in "quotation marks"') 应返回 Stuff in &quot;quotation marks&quot;

assert.match(
  convertHTML('Stuff in "quotation marks"'),
  /Stuff in &quot;quotation marks&quot;/
);

convertHTML("Schindler's List") 应返回 Schindler&apos;s List

assert.match(convertHTML("Schindler's List"), /Schindler&apos;s List/);

convertHTML("<>") 应返回 &lt;&gt;

assert.match(convertHTML('<>'), /&lt;&gt;/);

convertHTML("abc") 应该返回字符串 abc

assert.strictEqual(convertHTML('abc'), 'abc');

--seed--

--seed-contents--

function convertHTML(str) {
  return str;
}

convertHTML("Dolce & Gabbana");

--solutions--

var MAP = { '&': '&amp;',
            '<': '&lt;',
            '>': '&gt;',
            '"': '&quot;',
            "'": '&apos;'};

function convertHTML(str) {
  return str.replace(/[&<>"']/g, function(c) {
    return MAP[c];
  });
}