----------------------------xwml-------------------------------------------
<form  bindsubmit="formSubmit" bindreset="formReset">
<button formType="submit">提交</button>
</form>

--------------------------js---------------------------------------

Page({
    data:{},
    formSubmit:function(){
        var page=this;
        try{
            page.error()
        }catch(e){
            console.log(e.message);
        }
    },
    error:function(){
        throw new Error('aaaaa');
    }
})

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