![]() ![]() Now to make sure that this actually works in that our install of typescript worked. Now it doesn't really matter what it does for right now I just want you to focus on the fact that this is kind of the syntax we have some things are specific only to typescript. But for right now you can simply know that this is some typescript code. So you don't really have to worry about this we're going to get into each one of these and especially in the angular application. And I'm going to use the TS which stands for typescript and I'm going to open this up and you can see this is some basic typescript code. So inside of this I have a full set of files. I’ll switch into the project that I'm working on right now for the rails Angular 2. Typescript is on the system now, to test this out, we can actually play around with this a little bit even before we get into the language and the syntax so I'm going to go into the code, and I'm pretty sure I have this in devcamp tutorials rails angular. So hit return and this is going to go out and grab typescript for me. At the very front of it type in sudo because I've had some issues when I didn’t use sudo on this. So I'm going to switch over to the terminal and I'm going to paste this in. So the G stands for Global and then the name of the package and in this case it's going to be typescript. The -g flag is it's an option in the node package manager that says I want you to make this library available globally. And I'm going to install typescript by copying this code. But before we get there we first have to create our typescript system so let's come here. And on the Web site it's a great resource for being able to learn more about the typescript language be able to see how you can integrate it in with development environments and various text editors we're going to specifically integrate it in with Sublime Text for the Mac so that we can see all of the great tools like syntax highlighting and code completion that it offers so we'll be doing that in the next lesson. ![]() ![]() And you can scroll down and it actually is very easy to install. So come up to, and this is the official typescript Website by Microsoft. Now after changing this goto tsconfig.Now it's time for the moment of truth if you are on a Mac and you have homebrew installed and you have node in NPM installed then you are ready to go. So what you need to do in order to get rid of thisĮlse if (parsedCompilerOptions != valueToCheck & option != "jsx") Npm ERR! A complete log of this run can be found in: There is likely additional logging output above. Npm ERR! This is probably not a problem with npm. (/home/ehsan/Documents/GitHub/multi-step-form-typescript/node_modules/react-scripts/scripts/start.js:31:1)Īt Module._compile (internal/modules/cjs/loader.js:1137:30)Īt Object.Module._extensions.js (internal/modules/cjs/loader.js:1157:10)Īt Module.load (internal/modules/cjs/loader.js:985:32)Īt Function.Module._load (internal/modules/cjs/loader.js:878:14)Īt Function.executeUserEntryPoint (internal/modules/run_main.js:71:12)Īt internal/main/run_main_module.js:17:47 TypeError: Cannot assign to read only property 'jsx' of object '#'Īt verifyTypeScriptSetup (/home/ehsan/Documents/GitHub/multi-step-form-typescript/node_modules/react-scripts/scripts/utils/verifyTypeScriptSetup.js:239:43)Īt Object. home/ehsan/Documents/GitHub/multi-step-form-typescript/node_modules/react-scripts/scripts/utils/verifyTypeScriptSetup.js:239ĪpilerOptions = value The below error I am getting after running yarn start: > start /home/ehsan/Documents/GitHub/multi-step-form-typescript I'm going to tackle the last error next, as initially I didn't understand the JSX error above. HelloWorld.tsx(11,44): error TS2304: Cannot find name 'mountNode'. HelloWorld.tsx(11,14): error TS2607: JSX element class does not support attributes because it does not have a 'props' property React will remove the jsx syntax and turn it in to plain javascript so in the TSX file would become React.createElement("div", null).īy passing the react option, here's where we end up: I presume this is so you can use tools like JSX to actually provide the translation. Preserve will keep the jsx in the output. ![]() In the current iteration of TypeScript 1.6 appears to have two options for -jsx, both preserve or react. Message TS6081: Argument for '-jsx' must be 'preserve' or 'react'. The next error is new to me, but it makes some sense, so I add the -jsx flag to tsc and try tsc -jsx helloWorld.tsx, but looks like I missed a parameter to -jsx. This link was helpful to resolve this issue:įixing error TS17004: Cannot use JSX unless the '-jsx' flag is provided. ![]()
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