Minor performance improvements.

Author: anshu-krishna

html_scraper.php

@@ -98,26 +98,26 @@ public function xpath_textContent(string $expr, int $item = 0) {
 }
 }
 
-public function querySelector_innerHTML(string $expr, int $item = 0) {
-$node = $this->querySelector($expr, $item);
+public function querySelector_innerHTML(string $selector, int $item = 0) {
+$node = $this->xpath(static::CSS_to_Xpath($selector), $item);
 if($node === NULL) {
 return NULL;
 } else {
 return static::innerHTML($node);
 }
 }
 
-public function querySelector_outerHTML(string $expr, int $item = 0) {
-$node = $this->querySelector($expr, $item);
+public function querySelector_outerHTML(string $selector, int $item = 0) {
+$node = $this->xpath(static::CSS_to_Xpath($selector), $item);
 if($node === NULL) {
 return NULL;
 } else {
 return static::outerHTML($node);
 }
 }
 
-public function querySelector_textContent(string $expr, int $item = 0) {
-$node = $this->querySelector($expr, $item);
+public function querySelector_textContent(string $selector, int $item = 0) {
+$node = $this->xpath(static::CSS_to_Xpath($selector), $item);
 if($node === NULL) {
 return NULL;
 } else {