之前写成如下形式
layTool.table("#LAY-user-table", "{:url('index')}", [
    [{
        field: "id",
        title: "ID",
        width: "3%"
    },{
        field: "cover",
        title: "缩略图",
        templet:'<div><img src="{$Think.SITE_URL}{{d.cover}}" style="height: 100px;"/></div>'

    }]
)

但会收到不存在模块d.cover的报错，之后改为如下形式问题得到解决。

layTool.table("#LAY-user-table", "{:url('index')}", [
    [{
        field: "id",
        title: "ID",
        width: "3%"
    },{
        field: "cover",
        title: "缩略图",
        templet:function (d) {
            return '<div><img src="{$Think.SITE_URL}'+d.cover+'" style="height: 100px;"/></div>';
        }

    }]
)