Method appendLeft

benchmark/data-min.js:256–261

(t, e)

		return ((this.outro += t), this);
	}
	appendLeft(t, e) {
		if (typeof e != 'string') throw new TypeError('inserted content must be a string');
		this._split(t);
		const n = this.byEnd[t];
		return (n ? n.appendLeft(e) : (this.intro += e), this);
	}
	appendRight(t, e) {
		if (typeof e != 'string') throw new TypeError('inserted content must be a string');
		this._split(t);