JavaScript 代码优化：使用 localStorage 存储和更新关键词过滤数据

The code can be optimized by removing unnecessary code and simplifying the logic. Here is the optimized code:\n\njavascript\nlet KeywordFiltering = [\n { name: \"名字\", class: \"username\", data: [4, 5, 6] },\n { name: \"文案\", class: \"Copywriting\", data: [1, 2, 3] },\n { name: \"全选\", class: \"selectall\", data: [] }\n]\n\nlet Filtering = [\n { name: \"名字\", class: \"username\", data: [] },\n { name: \"文案\", class: \"Copywriting\", data: [] },\n { name: \"标签\", class: \"Tag\", data: [] },\n { name: \"全选\", class: \"selectall\", data: [] }\n]\n\nif (!localStorage.getItem(\"KeywordData\")) {\n localStorage.setItem(\"KeywordData\", JSON.stringify(KeywordFiltering))\n} else {\n let i = JSON.parse(localStorage.getItem(\"KeywordData\"))\n i = i.filter(item => item.data.length != 0)\n i.forEach(item => {\n let subItem = Filtering.find(sub => sub.name === item.name)\n if (subItem) {\n Object.assign(subItem, item)\n }\n })\n console.log(Filtering);\n}\n\n\nIn the optimized code:\n1. The unnecessary console.log statements are removed.\n2. The map function is replaced with forEach to modify the Filtering array in place.\n3. The find function is used to find the matching subItem in the Filtering array based on the name property.\n4. The Object.assign function is used to copy the properties from item to subItem.