纯js实现h5复制粘贴的功能_h5复制 文件 js

项目场景：

项目经常会出现复制粘贴,拷贝一段文字/手机号/兑换码,每次重新写比较麻烦,记录一下,方便以后调用

解决方案：

 webCopyString(str: string) {
        var input = str + '';
        const el = document.createElement('input');
        el.value = input;
        el.setAttribute('readonly', '');
        el.style.contain = 'strict';
        el.style.position = 'absolute';
        el.style.left = '-100vw';
        el.style.fontSize = '12px'; // Prevent zooming on iOS
        document.body.appendChild(el);
        el.select();
        el.selectionStart = 0;
        el.selectionEnd = input.length;
        var success = false;
        try {
            success = document.execCommand('copy');
        } catch (err) { }
 
        document.body.removeChild(el);
        return success;
    }
    onCopyCode(copyTxt) {
        const success = this.webCopyString(copyTxt);
        if (success) {
            alert('复制成功');
        } else {
            alert('复制失败');
        }
        console.log('success', success);
    }

使用方式 调用函数onCopyCode("需要复制的内容");