hacktricks/pentesting-web/xss-cross-site-scripting/debugging-client-side-js.md

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# Debugging Client Side JS
## Debugging Client Side JS
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Kurekebisha JS upande wa mteja kunaweza kuwa shida kwa sababu kila wakati unabadilisha URL (ikiwemo mabadiliko katika vigezo vilivyotumika au thamani za vigezo) unahitaji **kuweka upya breakpoint na kupakia tena ukurasa**.
### `debugger;`
Ikiwa utaweka mstari `debugger;` ndani ya faili la JS, wakati **browsa** inatekeleza JS itasimamisha **debugger** mahali hapo. Hivyo, njia moja ya kuweka breakpoints za kudumu itakuwa **kupakua faili zote kwenye kompyuta na kubadilisha kuweka breakpoints katika msimbo wa JS**.
### Overrides
Mabadiliko ya browsa yanaruhusu kuwa na nakala ya ndani ya msimbo ambayo itatekelezwa na kutekeleza hiyo badala ya ile kutoka kwa seva ya mbali.\
Unaweza **kufikia mabadiliko** katika "Dev Tools" --> "Sources" --> "Overrides".
Unahitaji **kuunda folda tupu ya ndani itakayotumika kuhifadhi mabadiliko**, hivyo tengeneza tu folda mpya ya ndani na uweke kama mabadiliko katika ukurasa huo.
Kisha, katika "Dev Tools" --> "Sources" **chagua faili** unayotaka kubadilisha na kwa **kubonyeza kulia chagua "Save for overrides"**.
![](<../../.gitbook/assets/image (742).png>)
Hii it **nakala faili la JS kwenye kompyuta** na utaweza **kubadilisha nakala hiyo katika browsa**. Hivyo ongeza tu amri **`debugger;`** popote unapotaka, **hifadhi** mabadiliko na **pakiwa tena** ukurasa, na kila wakati unapoingia kwenye ukurasa huo wa wavuti **nakala yako ya ndani ya JS itakuwa inapakuliwa** na amri yako ya debugger itabaki mahali pake:
![](<../../.gitbook/assets/image (594).png>)
## References
* [https://www.youtube.com/watch?v=BW\_-RCo9lo8\&t=1529s](https://www.youtube.com/watch?v=BW\_-RCo9lo8\&t=1529s)
{% hint style="success" %}
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
<details>
<summary>Support HackTricks</summary>
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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