computed: {
// (滚动区高度：iframe图片响应式适配)
scrollerHeight: function() {
return (window.innerHeight - 80) + ‘px’;
}
},

mounted() {
    this.$nextTick(() => {
        let h = this.$refs.main.offsetHeight;
        let h_btngroup = this.$refs.btngroup.offsetHeight;
        let h_main = h - 40 - h_btngroup;
        this.style_form =
            "height:" + h_main + "px;overflow-y:auto;overflow-x:hidden;";
    });
},
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