javascript - 正则表达式中的未终止组

Question

我尝试在 JavaScript 中使用正则表达式测试字符串。正确的字符串如下所示:

<script charset="utf-8">new DGWidgetLoader({"width":640,"height":600,"borderColor":"#a3a3a3","pos":{"lat":46.00650100065259,"lon":11.263732910156252,"zoom":9}

我想测试“width”、“height”看起来像 xxx 或 xxxx，以及“lat”、“lon”看起来像 x{1,2}.x*，缩放看起来像 x{1,2}

我尝试使用这个正则表达式

/<script charset="utf-8">new DGWidgetLoader(/{"width":[0-9]{3,4},"height":[0-9]{3,4},"borderColor":"#a3a3a3","pos":\{"lat":[0-9]{1,2}.[0-9]+,"lon":[0-9]{1,2}.[0-9]+,"zoom":[0-9][0-9]}//

使用 String.search()，但出现错误 SyntaxError: Invalid regular expression: /<script charset="utf-8">new DGWidgetLoader(/{"width":[0-9]{3,4},"height":[0-9]{3,4},"borderColor":"#a3a3a3","pos":{"lat":[0-9]{1,2}.[0-9]+,"lon":[0-9]{1,2}.[0-9]+,"zoom":[0-9][0-9]}//: Unterminated group

我如何解析如下所示的脚本标签？

Answer 1

你应该用 \ 转义 (, {, } 和 . :

/<script charset="utf-8">new DGWidgetLoader\(\{"width":[0-9]{3,4},"height":[0-9]{3,4},"borderColor":"#a3a3a3","pos":\{"lat":[0-9]{1,2}\.[0-9]+,"lon":[0-9]{1,2}\.[0-9]+,"zoom":[0-9][0-9]\}/