问右击可以使用javascript从文本区域获取单词吗？

EN

document.querySelector('textarea').addEventListener('contextmenu', function (e) {
        e.preventDefault();

        var startPosition = this.selectionStart,
            endPosition = this.selectionEnd;

        while (this.value.charAt(startPosition) !== ' ' && startPosition >= 0) {
            startPosition--;
        }

        while (this.value.charAt(endPosition) !== ' ' && endPosition < this.value.length) {
            endPosition++;
        }

        this.selectionStart = startPosition + 1;
        this.selectionEnd = endPosition;

    })

<textarea>This is some text. Click on any word and then do right click</textarea>