buf.includes(value[, byteOffset][, encoding])

• value <string> | <Buffer> | <Uint8Array> | <integer> 要搜索的内容。
• byteOffset <integer> 开始搜索 buf 的位置。 如果为负数，则从 buf 的末尾开始计算偏移量。 默认值: 0。
• encoding <string> 如果 value 是字符串，则这就是它的编码。 默认值: 'utf8'。
• 返回: <boolean> 如果在 buf 中找到 value，则为 true，否则为 false。

相当于 buf.indexOf() !== -1。

const buf = Buffer.from('this is a buffer');

console.log(buf.includes('this'));
// 打印: true
console.log(buf.includes('is'));
// 打印: true
console.log(buf.includes(Buffer.from('a buffer')));
// 打印: true
console.log(buf.includes(97));
// 打印: true （97 是 'a' 的十进制 ASCII 值）
console.log(buf.includes(Buffer.from('a buffer example')));
// 打印: false
console.log(buf.includes(Buffer.from('a buffer example').slice(0, 8)));
// 打印: true
console.log(buf.includes('this', 4));
// 打印: false

• value <string> | <Buffer> | <Uint8Array> | <integer> What to search for.
• byteOffset <integer> Where to begin searching in buf. If negative, then offset is calculated from the end of buf. Default: 0.
• encoding <string> If value is a string, this is its encoding. Default: 'utf8'.
• Returns: <boolean> true if value was found in buf, false otherwise.

Equivalent to buf.indexOf() !== -1.

const buf = Buffer.from('this is a buffer');

console.log(buf.includes('this'));
// Prints: true
console.log(buf.includes('is'));
// Prints: true
console.log(buf.includes(Buffer.from('a buffer')));
// Prints: true
console.log(buf.includes(97));
// Prints: true (97 is the decimal ASCII value for 'a')
console.log(buf.includes(Buffer.from('a buffer example')));
// Prints: false
console.log(buf.includes(Buffer.from('a buffer example').slice(0, 8)));
// Prints: true
console.log(buf.includes('this', 4));
// Prints: false