Teach you to rely on management hand in hand

Do you know what dependency is ?

Software engineering is the result of the cooperation of many people , When we develop software, we often use something written by others , A relatively mature Library .

such as , Early front-end development used iQuery library , Then the usual way is to go to the official website to download the latest version jQuery, Then put it in your local project . For simple front-end projects , In this way, the goal can be achieved simply and roughly .

But when the project gets bigger and bigger , except jQuery outside , You will also rely on other third-party libraries . such as Bootstrap And Chosen, These two popular front-end libraries also rely on jQuery, If these third-party libraries depend on jQuery The version is consistent and good , But most of the situation is not so optimistic ：

Your project depends on jQuery The version is 1.0.0,Bootstrap The dependent version is 1.1.0, and Chosen The dependent version is 120, It seems that the small versions are inconsistent , I didn't find any problems at first , But if you find incompatibility later , It may be too late .

therefore , You need to identify dependencies before , Just sort out the dependencies of the whole system , Ensure that every dependency will not have conflict problems .

You may question , This front-end engineer must be a junior , It will not be confirmed in advance Bootstrap and Chosen Dependent version , Direct selection dependency iQuery100 The version is not enough ?

That makes sense , But maintaining these dependencies manually is quite troublesome and error prone . Find a popular open source software , You will find that it relies on a large number of third-party libraries , These third-party libraries depend on other third-party libraries , It forms a very complex dependency chain . Solving this chain of dependence manually will definitely make you doubt life , So you need some tools to manage project dependencies .

How many dependency management tools have you seen ?

Actually , Each major platform has already had its own means to solve the above problems , If you look carefully,