js 匹配关键词

const text = "I love JavaScript and JS is awesome!";
const keywords = /JavaScript|JS/g; // 使用 | 表示“或”的关系，g 表示全局匹配
const matches = text.match(keywords);

console.log(matches); // 输出: ["JavaScript", "JS"]

const text = "I love javascript and JS is awesome!";
const keywords = /javascript|js/gi; // 添加 i 标志
const matches = text.match(keywords);

console.log(matches); // 输出: ["javascript", "JS"]

const text = "Price is $100 and discount is 20%.";
const keyword = /\$100|20%/g; // $ 是特殊字符，需要转义
const matches = text.match(keyword);

console.log(matches); // 输出: ["$100", "20%"]

const text = "cat caterpillar category";
const keyword = /\bcat\b/g;
const matches = text.match(keyword);

console.log(matches); // 输出: ["cat"]