July 2018
Beginner
236 pages
5h 34m
English
Content preview from MobX Quick Start Guide
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Options for reaction()
Similar to autorun(), we can pass an extra argument to reaction() that contains the options:
reaction(() => {/* tracking data */}, (data) => { /* side effects */}, options)
Some of the options, as shown below, are exactly like autorun, which keeps it consistent:
- name
- delay
- onError
However, there are additional options, specifically for reaction():
- fireImmediately: This is a boolean value that indicates whether the effect-function should be triggered immediately after the first invocation of the tracking-function. Notice that this behavior gets us closer to autorun(), which also runs immediately. By default, it is set to false.
- equals: Notice that the tracking-function in a reaction() gives back data that is used ...
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