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eval-json-path
Advanced tools
Readme
Evaluate/Query the value of json object at given path
Commonly js object variable can be accessed by property name or index. This module allow to access by path/steps given by a string
const evalJsonPath = require('eval-json-path')
const value = evalJsonPath(obj, 'prop.subprop[prett-prop][3].lastprop')
const sameValue = obj.prop.subprop['prett-prop'][3].lastprop
The evaluation is done by each step, which is null-safe, any not-existing step will result undefined or fallback
evalJsonPath(obj, path, fallback)
const obj = {
step1: {
step2: {
'pretty.nice-step': [
{},
{step3: 4}
]
}
}
}
evalJsonPath(null, 'step1'); // undefined
evalJsonPath(undefined, 'step1'); // undefined
evalJsonPath(3, 'step1'); // undefined
evalJsonPath(false, 'step1'); // undefined
evalJsonPath(obj, 'step1'); // same as obj.step1
evalJsonPath(obj, 'step1.step2'); // same as obj.step1.step2
evalJsonPath(obj, 'step1.step2[pretty.nice-step]'); // obj.step1.step2['pretty.nice-step'])
evalJsonPath(obj, 'step1.step2[pretty.nice-step][1].step3'); // obj.step1.step2['pretty.nice-step'][1].step3)
evalJsonPath(obj, 'step1.xxxxx[pretty.nice-step][1].step3'); // any non-exist step result undefined
FAQs
Evaluate and query json object value at given path
We found that eval-json-path demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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