Add tsserver support

ale_linters/typescript/tsserver.vim

@@ -0,0 +1,23 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: tsserver integration for ALE
+
+call ale#Set('typescript_tsserver_executable', 'tsserver')
+call ale#Set('typescript_tsserver_config_path', '')
+call ale#Set('typescript_tsserver_use_global', 0)
+
+function! ale_linters#typescript#tsserver#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'typescript_tsserver', [
+    \   'node_modules/.bin/tsserver',
+    \])
+endfunction
+
+function! ale_linters#typescript#tsserver#Handle(buffer, lines) abort
+    return a:lines
+endfunction
+
+call ale#linter#Define('typescript', {
+\   'name': 'tsserver',
+\   'lsp': 'tsserver',
+\   'executable_callback': 'ale_linters#typescript#tsserver#GetExecutable',
+\   'callback': 'ale_linters#typescript#tsserver#Handle',
+\})