JSON.parse解析具有HTML内容

Question

我有下面的代码，我试图用我保持对JSON解析器收到错误

var data = JSON.parse('[{"thisFieldname":"item-company-1","thisFieldHTML":"\n\t\t\t\t\t<div class=\"new-company-field field-item\">\n\t\t\t\t\t\t<div class=\"fake-data\">\n\t\t\t\t\t\t\tCompany\n\t\t\t\t\t\t</div>\n\t\t\t\t\t</div>\n\t\t\t\t<div class=\"ui-resizable-handle ui-resizable-e\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-s\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-se ui-icon ui-icon-gripsmall-diagonal-se\" style=\"z-index: 90; display: block;\"></div>","dataFieldName":"item-company-1","locationIndex":"0","locationLeft":"427.891px","locationTop":"88.5625px","itemWidth":"100px","itemHeight":"34px","fieldRole":"","fieldDefault":"","fieldTooltip":"","fieldValidationRule":"","fieldValidationCharSet":"","fieldValidationDateFormat":"","fieldDisplayFormat":"","fieldValidationCountry":"","fieldValidationMaxLen":"","fieldValidationMinVal":"","fieldValidationMaxVal":"","fieldValidationRegExp":"","fieldValidationFormula":"","fieldValidationErrMsg":"","valid":"","condition-field":"","condition-type":"","condition-value-select":"","fontName":"","fontSize":"","fontAlign":"","fieldColorPicker":"","fieldRequired":"false","fieldReadOnly":"false","fieldMasked":"false","fieldMultiline":"false"}]'); 

的JSON被认为是JSON时抛出错误我试过时有效的JSON https://jsonformatter.curiousconcept.com/

Answer 1

你的推理是错误的。你检查了一个表达式expr是有效的JSON，然后认为JSON.parse('expr')会工作。

问题是字符串文字不能像那样工作。

表达“\ t” 的是有效的JSON，但字符串文字'"\t"'成为串“”，这是无效的JSON。如果你想得到字符串“\ t”，你需要字符串文字'"\\t"'。

所以，你可以逃避所有这些字符：

console.log(JSON.parse("[{\"thisFieldname\":\"item-company-1\",\"thisFieldHTML\":\"\\n\\t\\t\\t\\t\\t<div class=\\\"new-company-field field-item\\\">\\n\\t\\t\\t\\t\\t\\t<div class=\\\"fake-data\\\">\\n\\t\\t\\t\\t\\t\\t\\tCompany\\n\\t\\t\\t\\t\\t\\t</div>\\n\\t\\t\\t\\t\\t</div>\\n\\t\\t\\t\\t<div class=\\\"ui-resizable-handle ui-resizable-e\\\" style=\\\"z-index: 90; display: block;\\\"></div><div class=\\\"ui-resizable-handle ui-resizable-s\\\" style=\\\"z-index: 90; display: block;\\\"></div><div class=\\\"ui-resizable-handle ui-resizable-se ui-icon ui-icon-gripsmall-diagonal-se\\\" style=\\\"z-index: 90; display: block;\\\"></div>\",\"dataFieldName\":\"item-company-1\",\"locationIndex\":\"0\",\"locationLeft\":\"427.891px\",\"locationTop\":\"88.5625px\",\"itemWidth\":\"100px\",\"itemHeight\":\"34px\",\"fieldRole\":\"\",\"fieldDefault\":\"\",\"fieldTooltip\":\"\",\"fieldValidationRule\":\"\",\"fieldValidationCharSet\":\"\",\"fieldValidationDateFormat\":\"\",\"fieldDisplayFormat\":\"\",\"fieldValidationCountry\":\"\",\"fieldValidationMaxLen\":\"\",\"fieldValidationMinVal\":\"\",\"fieldValidationMaxVal\":\"\",\"fieldValidationRegExp\":\"\",\"fieldValidationFormula\":\"\",\"fieldValidationErrMsg\":\"\",\"valid\":\"\",\"condition-field\":\"\",\"condition-type\":\"\",\"condition-value-select\":\"\",\"fontName\":\"\",\"fontSize\":\"\",\"fontAlign\":\"\",\"fieldColorPicker\":\"\",\"fieldRequired\":\"false\",\"fieldReadOnly\":\"false\",\"fieldMasked\":\"false\",\"fieldMultiline\":\"false\"}]"));

或者直接使用对象，并让JS解析它：

console.log([{"thisFieldname":"item-company-1","thisFieldHTML":"\n\t\t\t\t\t<div class=\"new-company-field field-item\">\n\t\t\t\t\t\t<div class=\"fake-data\">\n\t\t\t\t\t\t\tCompany\n\t\t\t\t\t\t</div>\n\t\t\t\t\t</div>\n\t\t\t\t<div class=\"ui-resizable-handle ui-resizable-e\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-s\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-se ui-icon ui-icon-gripsmall-diagonal-se\" style=\"z-index: 90; display: block;\"></div>","dataFieldName":"item-company-1","locationIndex":"0","locationLeft":"427.891px","locationTop":"88.5625px","itemWidth":"100px","itemHeight":"34px","fieldRole":"","fieldDefault":"","fieldTooltip":"","fieldValidationRule":"","fieldValidationCharSet":"","fieldValidationDateFormat":"","fieldDisplayFormat":"","fieldValidationCountry":"","fieldValidationMaxLen":"","fieldValidationMinVal":"","fieldValidationMaxVal":"","fieldValidationRegExp":"","fieldValidationFormula":"","fieldValidationErrMsg":"","valid":"","condition-field":"","condition-type":"","condition-value-select":"","fontName":"","fontSize":"","fontAlign":"","fieldColorPicker":"","fieldRequired":"false","fieldReadOnly":"false","fieldMasked":"false","fieldMultiline":"false"}]);

Answer 2

\n在JavaScript字符串中插入一个新的行字符。在JSON字符串中禁止使用文字新行。

\"在JavaScript字符串中，会插入一个"字符。 JSON字符串中的文字"将终止该字符串。

问题不在于HTML。它是特殊字符。您需要跳过\（作为\\），以便转义序列由JSON解析器评估，而不是由JavaScript编译器评估。

---

也就是说，生成JSON然后将其嵌入为立即解析的字符串文字看起来过于复杂和毫无意义。首先使用JS数组文本，然后跳过所有的嵌套。

Answer 3

由于您尝试将对象转换为字符串，然后对其进行解析，而没有进行正确的转换，您会收到错误消息。

您可以通过两种方式使用该对象。

1. 直接用作对象
2. 第一转换对象以正确的JSON字符串透过JSON.stringify，然后解析它。请参见下面的示例代码

示例代码

data = [{"thisFieldname":"item-company- 1","thisFieldHTML":"\n\t\t\t\t\t<div class=\"new-company-field field-item\">\n\t\t\t\t\t\t<div class=\"fake-data\">\n\t\t\t\t\t\t\tCompany\n\t\t\t\t\t\t</div>\n\t\t\t\t\t</div>\n\t\t\t\t<div class=\"ui-resizable-handle ui-resizable-e\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-s\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-se ui-icon ui-icon-gripsmall-diagonal-se\" style=\"z-index: 90; display: block;\"></div>","dataFieldName":"item-company-1","locationIndex":"0","locationLeft":"427.891px","locationTop":"88.5625px","itemWidth":"100px","itemHeight":"34px","fieldRole":"","fieldDefault":"","fieldTooltip":"","fieldValidationRule":"","fieldValidationCharSet":"","fieldValidationDateFormat":"","fieldDisplayFormat":"","fieldValidationCountry":"","fieldValidationMaxLen":"","fieldValidationMinVal":"","fieldValidationMaxVal":"","fieldValidationRegExp":"","fieldValidationFormula":"","fieldValidationErrMsg":"","valid":"","condition-field":"","condition-type":"","condition-value-select":"","fontName":"","fontSize":"","fontAlign":"","fieldColorPicker":"","fieldRequired":"false","fieldReadOnly":"false","fieldMasked":"false","fieldMultiline":"false"}]; 



data = JSON.parse(JSON.stringify([{"thisFieldname":"item-company- 1","thisFieldHTML":"\n\t\t\t\t\t<div class=\"new-company-field field-item\">\n\t\t\t\t\t\t<div class=\"fake-data\">\n\t\t\t\t\t\t\tCompany\n\t\t\t\t\t\t</div>\n\t\t\t\t\t</div>\n\t\t\t\t<div class=\"ui-resizable-handle ui-resizable-e\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-s\" style=\"z-index: 90; display: block;\"></div><div class=\"ui-resizable-handle ui-resizable-se ui-icon ui-icon-gripsmall-diagonal-se\" style=\"z-index: 90; display: block;\"></div>","dataFieldName":"item-company-1","locationIndex":"0","locationLeft":"427.891px","locationTop":"88.5625px","itemWidth":"100px","itemHeight":"34px","fieldRole":"","fieldDefault":"","fieldTooltip":"","fieldValidationRule":"","fieldValidationCharSet":"","fieldValidationDateFormat":"","fieldDisplayFormat":"","fieldValidationCountry":"","fieldValidationMaxLen":"","fieldValidationMinVal":"","fieldValidationMaxVal":"","fieldValidationRegExp":"","fieldValidationFormula":"","fieldValidationErrMsg":"","valid":"","condition-field":"","condition-type":"","condition-value-select":"","fontName":"","fontSize":"","fontAlign":"","fieldColorPicker":"","fieldRequired":"false","fieldReadOnly":"false","fieldMasked":"false","fieldMultiline":"false"}]));