JSON.parse具有有效JSON的无效字符？

Question

因此，我有一个对象，其属性中也包含json字符串。 序列化此对象时，这是我得到的字符串：

[{
    "template": 1,
    "action_json": "{\"id\":\"1\",\"action\":\"An action for all of IT!\",\"date_agreed\":\"2018-08-10\",\"complete_by\":\"2018-08-31\",\"responsible_departments\":[\"8\"],\"responsible_employees\":[\"1629\",\"112\",\"1374\"],\"priority\":\"High\"}",
    "template_json": "{\"columns\":[{\"id\":\"id\",\"title\":\"Task Number\",\"default\":true,\"type\":\"auto\"},{\"id\":\"action\",\"title\":\"Action Agreed\",\"default\":true,\"type\":\"longtext\"},{\"id\":\"date_agreed\",\"title\":\"Date Agreed\",\"default\":true,\"type\":\"date\"},{\"id\":\"complete_by\",\"title\":\"Complete By\",\"default\":true,\"type\":\"date\"},{\"id\":\"responsible_departments\",\"title\":\"Responsible Departments\",\"default\":true,\"type\":\"option\"},{\"id\":\"responsible_employees\",\"title\":\"Responsible Employees\",\"default\":true,\"type\":\"option\"},{\"id\":\"priority\",\"title\":\"Priority\",\"default\":true,\"type\":\"option\",\"options\":[\"High\",\"Medium\",\"Low\"]}]}"
}, {
    "template": 1,
    "action_json": "{\"id\":\"1\",\"action\":\"Action numero uno\",\"date_agreed\":\"2018-08-10\",\"complete_by\":\"2018-08-10\",\"responsible_departments\":[\"8\"],\"responsible_employees\":[\"112\"],\"priority\":\"High\"}",
    "template_json": "{\"columns\":[{\"id\":\"id\",\"title\":\"Task Number\",\"default\":true,\"type\":\"auto\"},{\"id\":\"action\",\"title\":\"Action Agreed\",\"default\":true,\"type\":\"longtext\"},{\"id\":\"date_agreed\",\"title\":\"Date Agreed\",\"default\":true,\"type\":\"date\"},{\"id\":\"complete_by\",\"title\":\"Complete By\",\"default\":true,\"type\":\"date\"},{\"id\":\"responsible_departments\",\"title\":\"Responsible Departments\",\"default\":true,\"type\":\"option\"},{\"id\":\"responsible_employees\",\"title\":\"Responsible Employees\",\"default\":true,\"type\":\"option\"},{\"id\":\"priority\",\"title\":\"Priority\",\"default\":true,\"type\":\"option\",\"options\":[\"High\",\"Medium\",\"Low\"]}]}"
}]

很好，这是有效的JSON。

当我尝试通过解析此字符串（使用PHP）来创建JavaScript对象时，就会出现问题：

echo "<script>
    var employeeActions = JSON.parse('".json_encode($employeeActions)."');
</script>";

然后我得到：

JSON.parse错误：位置33处的字符无效

在页面加载后检查页面时，这是通过我的PHP脚本回显的内容：

<script>
    var employeeActions = JSON.parse('[{"template":1,"action_json":"{\"id\":\"1\",\"action\":\"An action for all of IT!\",\"date_agreed\":\"2018-08-10\",\"complete_by\":\"2018-08-31\",\"responsible_departments\":[\"8\"],\"responsible_employees\":[\"1629\",\"112\",\"1374\"],\"priority\":\"High\"}","template_json":"{\"columns\":[{\"id\":\"id\",\"title\":\"Task Number\",\"default\":true,\"type\":\"auto\"},{\"id\":\"action\",\"title\":\"Action Agreed\",\"default\":true,\"type\":\"longtext\"},{\"id\":\"date_agreed\",\"title\":\"Date Agreed\",\"default\":true,\"type\":\"date\"},{\"id\":\"complete_by\",\"title\":\"Complete By\",\"default\":true,\"type\":\"date\"},{\"id\":\"responsible_departments\",\"title\":\"Responsible Departments\",\"default\":true,\"type\":\"option\"},{\"id\":\"responsible_employees\",\"title\":\"Responsible Employees\",\"default\":true,\"type\":\"option\"},{\"id\":\"priority\",\"title\":\"Priority\",\"default\":true,\"type\":\"option\",\"options\":[\"High\",\"Medium\",\"Low\"]}]}"},{"template":1,"action_json":"{\"id\":\"1\",\"action\":\"Action numero uno\",\"date_agreed\":\"2018-08-10\",\"complete_by\":\"2018-08-10\",\"responsible_departments\":[\"8\"],\"responsible_employees\":[\"112\"],\"priority\":\"High\"}","template_json":"{\"columns\":[{\"id\":\"id\",\"title\":\"Task Number\",\"default\":true,\"type\":\"auto\"},{\"id\":\"action\",\"title\":\"Action Agreed\",\"default\":true,\"type\":\"longtext\"},{\"id\":\"date_agreed\",\"title\":\"Date Agreed\",\"default\":true,\"type\":\"date\"},{\"id\":\"complete_by\",\"title\":\"Complete By\",\"default\":true,\"type\":\"date\"},{\"id\":\"responsible_departments\",\"title\":\"Responsible Departments\",\"default\":true,\"type\":\"option\"},{\"id\":\"responsible_employees\",\"title\":\"Responsible Employees\",\"default\":true,\"type\":\"option\"},{\"id\":\"priority\",\"title\":\"Priority\",\"default\":true,\"type\":\"option\",\"options\":[\"High\",\"Medium\",\"Low\"]}]}"}]');
</script>

Answer 1

您从json_encode输出的文本将在通过JSON.parse之前，通过JavaScript字符串文字的解析器进行传递。

由于JSON和JS字符串文字使用相同的转义字符，因此将其破坏！ 您正在混搭'字符和数据以尝试以编程方式构造JS字符串文字，但是数据包含JS中具有特殊含义的字符。

 "{\\"i 

它将显示字符33。将解析JS字符串文字\\"并在字符串中放入未转义的" 。

忘记使用JSON.parse 。 无需尝试将JSON传递给浏览器。 请记住，JSON和JavaScript文字语法或多或少是同一件事：

<script>
var employeeActions = <?php echo json_encode($employeeActions); ?>;
</script>