Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
mis

Test String

Code Generator

Language

Generated Code

const regex = /(?<=var\svars).*(?=\\n\\nif \(!var)/mis; // Alternative syntax using RegExp constructor // const regex = new RegExp('(?<=var\\svars).*(?=\\\\n\\\\nif \\(!var)', 'mis') const str = `;\\n}\\nvar vars = {\\"uid\\":\\"170785079\\",\\"vid\\":171461352,\\"oid\\":170785079,\\"host\\":509202,\\"vtag\\":\\"493bf2f9dd\\",\\"ltag\\":\\"l_8f6ca452\\",\\"vkid\\":171461352,\\"md_title\\":\\"6dfdbda80019208839183a713f243a41\\",\\"md_author\\":\\"Ayxan &#399;miraslanl\\",\\"author_id\\":170785079,\\"author_href\\":\\"\\\\\\/mr.ayxan\\",\\"hd\\":3,\\"no_flv\\":1,\\"hd_def\\":-1,\\"dbg_on\\":0,\\"t\\":\\"\\",\\"duration\\":244,\\"angle\\":0.000000,\\"img_angle\\":0.000000,\\"repeat\\":0,\\"show_ads_preroll\\":0,\\"show_ads_postroll\\":0,\\"show_ads_promo_preroll\\":0,\\"show_ads_overlay\\":0,\\"ads_type\\":-1,\\"legal_owner\\":0,\\"eid1\\":0,\\"slot\\":0,\\"g\\":1,\\"a\\":18,\\"puid34\\":0,\\"water_mark\\":\\"\\",\\"can_rotate\\":1,\\"hash\\":\\"19e3bc2d2ae2f2ce34f6fbaefcf93e2d\\",\\"hash2\\":\\"246f9680b9b4f835\\",\\"is_vk\\":\\"1\\",\\"is_ext\\":\\"0\\",\\"referrer\\":\\"\\",\\"c3\\":\\"\\",\\"sample_id\\":-1,\\"cat_id\\":13,\\"sitezone\\":17,\\"ads_preview\\":0,\\"puid4\\":0,\\"puid5\\":14,\\"puid6\\":86,\\"pl_type\\":\\"other\\",\\"nolikes\\":1,\\"lang_add\\":\\"Add to My Videos\\",\\"lang_added\\":\\"Video added to My Videos\\",\\"lang_share\\":\\"Share\\",\\"lang_like\\":\\"Like\\",\\"lang_subscribe\\":\\"Subscribe\\",\\"lang_subscribed\\":\\"You have subscribed\\",\\"lang_volume_on\\":\\"Unmute\\",\\"lang_volume_off\\":\\"Mute\\",\\"lang_volume\\":\\"Volume\\",\\"lang_hdsd\\":\\"Change Video Quality\\",\\"lang_quality_auto\\":\\"Auto\\",\\"lang_open_popup\\":\\"Expand\\",\\"lang_fullscreen\\":\\"Full Screen\\",\\"lang_window\\":\\"Minimize\\",\\"lang_rotate\\":\\"Rotate\\",\\"lang_ads_link\\":\\"Advertiser&#39;s Site\\",\\"lang_ads\\":\\"Ads\\",\\"lang_ads_skip\\":\\"Skip ad\\",\\"lang_ads_skip_time\\":\\"Skip ads in {time} s\\",\\"lang_report_problem\\":\\"Report a problem..\\",\\"lang_replay\\":\\"Replay\\",\\"lang_next_cancel\\":\\"Cancel\\",\\"video_play_hd\\":\\"Watch in HD\\",\\"video_stop_loading\\":\\"Stop Download\\",\\"video_player_version\\":\\"VK Video Player\\",\\"goto_orig_video\\":\\"Go to Video\\",\\"video_get_video_code\\":\\"Copy video code\\",\\"video_load_error\\":\\"The video has not uploaded yet or the server is not available\\",\\"video_get_current_url\\":\\"Copy frame link\\",\\"lang_next\\":\\"Next video\\",\\"url240\\":\\"https:\\\\\\/\\\\\\/cs509202.vk.me\\\\\\/8\\\\\\/u170785079\\\\\\/videos\\\\\\/493bf2f9dd.240.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\\",\\"url360\\":\\"https:\\\\\\/\\\\\\/cs509202.vk.me\\\\\\/8\\\\\\/u170785079\\\\\\/videos\\\\\\/493bf2f9dd.360.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\\",\\"url480\\":\\"https:\\\\\\/\\\\\\/cs509209.vk.me\\\\\\/8\\\\\\/u170785079\\\\\\/videos\\\\\\/493bf2f9dd.480.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\\",\\"url720\\":\\"https:\\\\\\/\\\\\\/cs509209.vk.me\\\\\\/8\\\\\\/u170785079\\\\\\/videos\\\\\\/493bf2f9dd.720.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\\",\\"jpg\\":\\"https:\\\\\\/\\\\\\/pp.vk.me\\\\\\/c633320\\\\\\/v633320079\\\\\\/10dcc\\\\\\/GDFulD47LS8.jpg\\",\\"timeline_thumbs\\":1,\\"timeline_thumbs_jpg\\":\\"https:\\\\\\/\\\\\\/pp.vk.me\\\\\\/c628028\\\\\\/v628028079\\\\\\/363df\\\\\\/FVHRrSkD6HM.jpg,https:\\\\\\/\\\\\\/pp.vk.me\\\\\\/c633322\\\\\\/v633322079\\\\\\/f06a\\\\\\/CjskgJb-xxU.jpg\\",\\"timeline_thumbs_per_row\\":10,\\"timeline_thumbs_per_image\\":100,\\"timeline_thumbs_total\\":122,\\"timeline_thumb_width\\":133.000000,\\"timeline_thumb_height\\":75,\\"ip_subm\\":1,\\"proxy\\":\\"psv4\\",\\"https\\":1,\\"viewer_id\\":170785079,\\"nologo\\":1,\\"show_next\\":0,\\"show_suggestions\\":0,\\"liked\\":0,\\"add_hash\\":\\"0685c16b426a731323\\",\\"added\\":0,\\"can_add\\":0,\\"no_title\\":0,\\"vsegs_size\\":24.000000,\\"vsegs_hash\\":\\"1433edfd589e9d072b\\",\\"module\\":\\"direct\\",\\"playlist_id\\":null};\\n\\nif (!var`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; if ((m = regex.exec(str)) !== null) { // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions