“SyntaxError: Unexpected token < in JSON at position 0"

The wording of the error message corresponds to what you get from Google Chrome when you run JSON.parse('<...'). I know you said the server is setting Content-Type:application/json, but I am led to believe the response body is actually HTML.

Feed.js:94 undefined "parsererror" "SyntaxError: Unexpected token < in JSON at position 0"

with the line console.error(this.props.url, status, err.toString()) underlined.

The err was actually thrown within jQuery, and passed to you as a variable err. The reason that line is underlined is simply because that is where you are logging it.

I would suggest that you add to your logging. Looking at the actual xhr (XMLHttpRequest) properties to learn more about the response. Try adding console.warn(xhr.responseText) and yo

Related Posts:

  1. Uncaught TypeError: Cannot read property ‘props’ of null
  2. React Js: Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0
  3. react router v^4.0.0 Uncaught TypeError: Cannot read property ‘location’ of undefined
  4. Invariant Violation: Objects are not valid as a React child
  5. What is Virtual DOM?
  6. How to use Redirect in the new react-router-dom of Reactjs
  7. SyntaxError: Unexpected token o in JSON at position 1
  8. TypeError: Converting circular structure to JSON in nodejs
  9. Understanding unique keys for array children in React.js
  10. Difference between npx and npm?
  11. Fetch: POST JSON data
  12. Uncaught SyntaxError: Unexpected token u in JSON at position 0
  13. Unexpected token u in JSON at position 0 (but only sometimes)
  14. SyntaxError: Unexpected token o in JSON at position 1
  15. Loop inside React JSX
  16. Can’t resolve module (not found) in React.js
  17. How to read an external local JSON file in JavaScript?
  18. What is the convention in JSON for empty vs. null?
  19. how to render a react component using ReactDOM Render
  20. Parse Error: Adjacent JSX elements must be wrapped in an enclosing tag
  21. ‘react-scripts’ is not recognized as an internal or external command
  22. After $npm install, Getting Error: Cannot find module ‘../lib/utils/unsupported.js’
  23. Nested JSON objects – do I have to use arrays for everything?
  24. React Native: this.setState is not a function
  25. React: trigger onChange if input value is changing by state?
  26. In reactJS, how to copy text to clipboard?
  27. SyntaxError: Adjacent JSX elements must be wrapped in an enclosing tag
  28. You should not use Route or withRouter() outside a Router when using react-router 4 and styled-component in react
  29. React-Router only one child
  30. What does the className attribute mean in JSX?
  31. What is prevState in ReactJS? [duplicate]
  32. React with ES7: Uncaught TypeError: Cannot read property ‘state’ of undefined
  33. Setting a backgroundImage With React Inline Styles
  34. React – TypeError: Cannot read property ‘props’ of undefined
  35. How to compare arrays in JavaScript?
  36. What is the difference between state and props in React?
  37. jQuery AJAX cross domain
  38. OnChange event using React JS for drop down
  39. ESLint Parsing error: Unexpected token
  40. React Context vs React Redux, when should I use each one?
  41. Setting onSubmit in React.js
  42. How to import image (.svg, .png ) in a React Component
  43. ReactJS: setTimeout() not working?
  44. React Uncaught Error: Target container is not a DOM element [duplicate]
  45. React Error: Target Container is not a DOM Element
  46. How to convert JSON object to JavaScript array?
  47. How to implement authenticated routes in React Router 4?
  48. Uncaught TypeError: data.push is not a function
  49. How to handle the `onKeyPress` event in ReactJS?
  50. setInterval in a React app
  51. Cannot read property ‘bind’ of undefined. React.js
  52. How do you Hover in ReactJS? – onMouseLeave not registered during fast hover over
  53. ReactJS: setTimeout() not working?
  54. What does “export default” do in JSX?
  55. How to get JSON from URL in JavaScript?
  56. How do you put an image file in a json object?
  57. Uncaught Invariant Violation: Too many re-renders. React limits the number of renders to prevent an infinite loop
  58. Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of Transition which is inside StrictMode
  59. React.js – Can’t read property of undefined
  60. Pass react component as props
  61. Objects are not valid as a React child. If you meant to render a collection of children, use an array instead
  62. How to clear react-native cache?
  63. Cannot read property ‘getHostNode’ of null
  64. how to use react require syntax?
  65. React-Router : What is the purpose of IndexRoute?
  66. SyntaxError: Unexpected token C in JSON at position 0 – Ionic 2 Http GET request
  67. SyntaxError: JSON.parse: unexpected end of data at line 1 column 1 of the JSON data
  68. Add new attribute (element) to JSON object using JavaScript
  69. e.target.value on an input field ReactJs, how does it work?
  70. Uncaught Invariant Violation: Rendered more hooks than during the previous render
  71. How to display raw JSON data on a HTML page
  72. command not found: jest
  73. Convert array to JSON
  74. JSON.stringify (Javascript) and json.dumps (Python) not equivalent on a list?
  75. ReactJS – .JS vs .JSX
  76. ReactJS: Maximum update depth exceeded error
  77. React, Uncaught ReferenceError: ReactDOM is not defined
  78. How to allow CORS in react.js?
  79. How to add a button dynamically using jquery
  80. Invariant Violation: _registerComponent(…): Target container is not a DOM element
  81. Using setTimeout on promise chain
  82. Complex JSON nesting of objects and arrays
  83. How can JavaScript save to a local file?
  84. How to disable button in React.js
  85. What does “export default” do in JSX?
  86. Write / add data in JSON file using Node.js
  87. Defining a HTML template to append using JQuery
  88. where is create-react-app webpack config and files?
  89. Getting “Cannot call a class as a function” in my React Project
  90. What are the differences between JSON and JSONP?
  91. WP Rest API – How to get featured image
  92. 404 Error Contact Form 7 on WordPress
  93. Base64 & JSON Encode array in PHP, use as HTML data attribute, decode and parse in JavaScript …. with proper Escaping
  94. Pass data from wordpress to javascript in JSON
  95. How to include a JSON file on my page?
  96. Why WordPress not using JSON_UNESCAPED_UNICODE by default?
  97. how to use nimble-API and Display data?
  98. Remove escape characters from JSON string pulled from a database
  99. I would like to retrive JSON value and display it in wordpress page or widget
  100. Gutenberg core/file add style support in js/ json

Leave a Comment