typescript cannot use namespace as a type

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The same occurs for the newUser property, where you assign the property to the value of a new User instance. This post outlines the various ways to organize your code using modules and namespaces in TypeScript. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com. You need to export it inside module declaration: I was struggling to figure out how I could write a type definition for passing an external/3rd party module around. typescript cannot use namespace as a typecalculate the number of electrons passing per second typescript cannot use namespace as a type. The sample function runs the while loop for infinite times, and it will never stop. Users can use the never type when they are sure about any situation that will never occur. welcome TypeScript v3.8 with import type {} from ''. Next, add a User class inside the namespace to represent a User entity in the database: You can use your User class normally inside your namespace. Namespaces allow the developer to create separate organization units that can be used to hold multiple values, like properties, classes, types, and interfaces. SolveForum.com may not be responsible for the answers or solutions given to any question asked by the users. A captivating guide to the subtle caveats and lesser-known parts of JavaScript.eval(ez_write_tag([[468,60],'codingbeautydev_com-box-4','ezslot_3',166,'0','0'])); #mc_embed_signup{background:#fff;clear:left;font:14px Mulish,sans-serif}#mc_embed_signup .button{margin-left:16px!important;background-color:#1875f7!important;height:50px!important;font-weight:700}#mc_embed_signup .button:hover{background-color:#0475c8!important}#mce-EMAIL{height:50px;font-size:1.1em}#post-end-cta-image{height:550px;width:auto;box-shadow:0 0 10px #c0c0c0}, (function($){window.fnames=new Array();window.ftypes=new Array();fnames[0]='EMAIL';ftypes[0]='email';fnames[2]='LNAME';ftypes[2]='text';fnames[3]='ADDRESS';ftypes[3]='address';fnames[4]='PHONE';ftypes[4]='phone';fnames[5]='BIRTHDAY';ftypes[5]='birthday';fnames[1]='GIVEAWAY';ftypes[1]='text'})(jQuery);var $mcj=jQuery.noConflict(!0)var target=document.getElementById('mce-success-response');var successResponseShown=!1;var observer=new MutationObserver(function(mutations){for(var i=0;i I am very much not wise nor sharp with TypeScript, but TypeScript 2.9's import() syntax seems to be the answer I was looking for (after a long long long long amount of bumbling around, being misdirected): It looks like you are expecting to use the default export. In the test code at the bottom of the file, we now need to qualify the names of the types when used outside the namespace, e.g. This combination allows developers to use the full JavaScript ecosystem and language features, while also adding optional static type-checking, enum data types, classes, and interfaces. This was very confusing to me so I'd add a +1 for a better error message if possible, In my case just removing .ts entirely fixed the error strangely enough. In the example below, we have defined the variable and used the never keyword as a literal. For instance, you cant use the outFile option while targeting commonjs or umd, but with TypeScript 1.8 and later, its possible to use outFile when targeting amd or system.