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VS Code js编译支持alias

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08/10
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VS Code 的编译器 其实就是使用的 typescript 编译器，就是以前提到过的 tsserver.js

相应的编译参数可以参考 http://www.typescriptlang.org/docs/handbook/compiler-options.html

编译配置的话，只需要在项目中编写 jsconfig.json 或 tsconfig.json

1.增加配置属性

没仔细研究该怎么配置，直接按照paths的进行复制

{
name: "alias",
type: "object",
isTSConfigOnly: true,
category: ts.Diagnostics.Module_Resolution_Options,
description: ts.Diagnostics.A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl
},

2.在LoadModule方法中增加

function _getModuleUsingBaseUrlAliasPath(alias, moduleName) {
var flag = false;
var path = moduleName;
do {
flag = false;
for (var key in alias) {
if (path == key || path.indexOf(key + '/') === 0) {
path = alias[key] + path.substr(key.length)
flag = true;
}
}
} while(flag);
return path;
}
function tryLoadModuleUsingBaseUrlAlias(extensions, moduleName, loader, failedLookupLocations, state) {
var baseUrl = state.compilerOptions.baseUrl;
var path = '';
var flag = false;
var path = _getModuleUsingBaseUrlAliasPath(state.compilerOptions.alias, moduleName);
if (path == moduleName) return false;
var candidate = ts.normalizePath(ts.combinePaths(baseUrl, path));
var res = loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
return res;
}
function tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state) {
if (!state.compilerOptions.baseUrl) {
return undefined;
}
if (state.traceEnabled) {
trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
} if (state.compilerOptions.alias) {
var res = tryLoadModuleUsingBaseUrlAlias(extensions, moduleName, loader, failedLookupLocations, state);
if (res) {
return res;
}
}