regex101: JavaScript Match Workspace

Regular Expression

可愛(?=貓)

New

// 正向前瞻
const str1 = "可愛貓，可愛狗，可愛兔";
const regex1 = /可愛(?=貓)/g;
console.log(str1.match(regex1)); 

// 負向前瞻
const str2 = "可愛貓，可愛狗，可愛兔";
const regex2 = /可愛(?!貓)/g;
console.log(str2.match(regex2)); 

// 正向後顧
const str3 = "可愛貓，可愛狗，可愛兔";
const regex3 = /(?<=可愛)貓/g;
console.log(str3.match(regex3)); 

// 負向後顧
const str4 = "可愛貓，野生貓，可愛兔";
const regex4 = /(?<!可愛)貓/g;
console.log(str4.match(regex4)); 

// 嵌套
"Alice: 95, Bob: 88, Charlie: 92, David: 85";