js+转义数学符号

// 匹配加号
const regex = /\+/;
console.log(regex.test("1+1")); // true

// 匹配减号
const regexMinus = /-/;
console.log(regexMinus.test("1-1")); // true

// 匹配乘号
const regexMultiply = /\*/;
console.log(regexMultiply.test("1*1")); // true

// 匹配除号
const regexDivide = /\/;
console.log(regexDivide.test("1/1")); // true

const url = "http://example.com/search?q=1+1";
const encodedUrl = encodeURI(url);
console.log(encodedUrl); // http://example.com/search?q=1%2B1

<!-- 错误的示例，会导致HTML解析错误 -->
<input type="text" value="1+1">

<!-- 正确的示例，使用转义字符 -->
<input type="text" value="1&#43;1">

const regex = /\+/;
console.log(regex.test("1+1")); // true

const url = "http://example.com/search?q=1+1";
const encodedUrl = encodeURI(url);
console.log(encodedUrl); // http://example.com/search?q=1%2B1