Simple to use Chrome browser js breakpoint

F12 to open the debug mode, find the Sourcescolumn:

set a breakpoint by clicking on the row number:

point to submit, triggering js:

At this point, more than the breakpoint value all out:

you can point to continue 执行下一步to get value for each row in the breakpoint :

in this case, the value of cid came out:

it's Chrome browser easiest to use breakpoints.