<a href="javascript:void(0)" class="layui-btn submit-btn" lay-submit lay-filter="component-form-element">
<i style="display: none" class="layui-icon layui-icon-loading layui-icon layui-anim layui-anim-rotate layui-anim-loop"></i>
立即提交
</a>
var loading = $(this).find('.layui-icon');
if (loading.is(":visible")) return;
loading.show();
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