How does js get the specific value in json format

the json object passed from the previous page is (I don"t know why there are a lot of "", unsolved)

"{" img ": [" _ doc/uniapp_temp/compressed/1543388247982.jpg "]," time ":" 2018-11-28 "," title ":"} "

question: if you want the for loop to get the specific value of img,title,time, how to do it? when you print out i.img, you report a undefiend error, how do you get it?

Javascript
Dec.21,2021

after getting the json string, parse it with JSON.parse (value in json format), and then traverse

clipboard.png

delete the quotation marks at the beginning and end of the 'json', leaving behind the json object

you have a problematic format
"change the outer double quotation marks to''or the inner key value" to'

.

to ensure unexpected problems, I recommend you 

:
 A
 B
When the

A page wants to pass the json object to the B page, first JSON.stringify it (the JSON data you want to pass); this step looks like you have realized that the
B page receives using JSON.parse (received Json data)
for example, if you want to get the value of time (if it is an object, go to the example you gave above)
directly data.time it?
for example, if you want to get the value of time (if it is an object, there are many objects under the array of examples you gave above)
suppose our data is like this 

let arr = [
    {"img":["_doc/uniapp_temp/compressed/1543388247982.jpg"],"time":"2018-11-28","title":""},
    {"img":["_doc/uniapp_temp/compressed/1543388247982.jpg"],"time":"2018-11-28","title":""},
    {"img":["_doc/uniapp_temp/compressed/1543388247982.jpg"],"time":"2018-11-28","title":""},
];
 arr.map((item)=>{console.log(item.time)})

JSON.parse (str)

Previous: I would like to ask laravel how to obtain the data of the b table associated with polymorphism through table an and filter it by page.

Next: How to control the global loading for multiple requests on a page

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu