refactor: eliminate eslint errors (#920)

* refactor: eliminate eslint errors as many as I can

* refactor: fix more eslint errors in the record module

* LINT: fix @typescript-eslint/unbound-method

* LINT: fix all eslint errors in source code

* LINT: fix as many eslint warnings as possible

Co-authored-by: Justin Halsall <Juice10@users.noreply.github.com>

packages/rrweb-snapshot/src/css.ts

@@ -4,8 +4,7 @@
  * 1. The css library was built for node.js which does not have tree-shaking supports.
  * 2. Rewrites into typescript give us a better type interface.
  */
-
-/* tslint:disable no-conditional-assignment interface-name no-shadowed-variable */
+/* eslint-disable tsdoc/syntax */
 
 export interface ParserOptions {
   /** Silently fail on parse errors */
@@ -288,7 +287,7 @@ export function parse(css: string, options: ParserOptions = {}) {
 
   function error(msg: string) {
     const err = new Error(
-      options.source + ':' + lineno + ':' + column + ': ' + msg,
+      `${options.source || ''}:${lineno}:${column}: ${msg}`,
     ) as ParserError;
     err.reason = msg;
     err.filename = options.source;
@@ -457,6 +456,7 @@ export function parse(css: string, options: ParserOptions = {}) {
     const pos = position();
 
     // prop
+    // eslint-disable-next-line no-useless-escape
     const propMatch = match(/^(\*?[-#\/\*\\\w]+(\[[0-9a-z_-]+\])?)\s*/);
     if (!propMatch) {
       return;
@@ -469,6 +469,7 @@ export function parse(css: string, options: ParserOptions = {}) {
     }
 
     // val
+    // eslint-disable-next-line no-useless-escape
     const val = match(/^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^\)]*?\)|[^};])+)/);
 
     const ret = pos({
@@ -889,6 +890,7 @@ function addParent(obj: Stylesheet, parent?: Stylesheet) {
     const value = obj[k as keyof Stylesheet];
     if (Array.isArray(value)) {
       value.forEach((v) => {
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
         addParent(v, childParent);
       });
     } else if (value && typeof value === 'object') {