Vue-element-admin framework development issues

1. About the paging of the vue-element-admin project, return to the default display of the first page to solve the problem

Reference: https://blog.csdn.net/xfmuchengxue/article/details/84992879

	1. Store the current page number
		getList() {
			sessionStorage.setItem('pagination',this.listQuery.pageNum)
		},
	 2. Get the page number from sessionStorage and assign it to pageNum
		created() {
			this.$nextTick(() => {
				this.listQuery.pageNum=Number(sessionStorage.getItem('pagination')) || 1
			})
	},
	 3. Clear the stored page number
	beforeRouteLeave(to,from,next){
		if (to.name != "postMould_details" && to.name != "postMould_edit") {
			sessionStorage.removeItem('pagination')
		}
		next();
	}

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