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What are the main weaknesses of JavaScript as a programming language?

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Web developer with 6 year's of experience in IT industry

The main problem with JavaScript is that code is visible to everyone.
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Disadvantages of JavaScript Client-side Security. Since the JavaScript code is viewable to the user, others may use it for malicious purposes. ... Browser Support. The browser interprets JavaScript differently in different browsers. ... Lack of Debugging Facility. ... Single Inheritance. ... Sluggish...
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Disadvantages of JavaScript Client-side Security. Since the JavaScript code is viewable to the user, others may use it for malicious purposes. ... Browser Support. The browser interprets JavaScript differently in different browsers. ... Lack of Debugging Facility. ... Single Inheritance. ... Sluggish Bitwise Function. ... Rendering Stopped. read less
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Wroking in IT industry from last 15 years and and trained more than 5000+ Students. Conact ME

Dynamic typing, lack of built-in module system, inconsistent behavior across browsers, single-threaded nature, and potential for callback hell.
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