<button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#answers" aria-expanded="false" aria-controls="answers">点击查看</button>


<div class="modal fade " id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                <h4 class="modal-title" id="myModalLabel">用心做一件事，就一定会收到赞赏</h4>
            </div>
            <div class="modal-body">
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            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
            </div>
        </div>
    </div>
</div>


控制台没有报错