安装npm install case-tools使用const str = require('./case-tools'); console.log(str.targetNum('hello node,js', 'o')); //24 keywords3 dependents2 versionsStringCasetoLowerCasetoUpperCase@everything-registry/sub-chunk-1297@zalastax/nolb-case@infinitebrahmanuniverse/nolb-case1.1.02 years ago1.0.04 years ago