记录下解决的办法：
const h = this.$createElement;
let that = this;
this.$msgbox({
title: "扫码",
message: h("div", null, [
h("el-input", null, that.inputValue),
h("input", {
style: {
marginTop: "20px"
},
attrs: { value: that.inputValue, id:"hinput"},
on: {
input: this.handleClick
}
})
]),
showCancelButton: true,
confirmButtonText: "确定",
cancelButtonText: "取消",
beforeClose: (action, instance, done) => {
if (action === "confirm") {
instance.confirmButtonLoading = true;
instance.confirmButtonText = "执行中...";
setTimeout(() => {
done();
setTimeout(() => {
instance.confirmButtonLoading = false;
}, 300);
}, 3000);
} else {
done();
}
}
}).then(action => {
this.$message({
type: "info",
message: "action: " + action
});
});
handleClick(val) {
var a=document.getElementById("hinput").value;
this.inputValue = a
console.log(this.inputValue)
}
感觉不是最好的方法，但是反馈下