JavaScript Learning Path: From History to Security

Creation at Netscape and LiveScript origins

JavaScript originated at Netscape in the mid-1990s to add dynamic, interactive behavior to web pages that were previously static after load. Netscape Navigator (1994) became the dominant browser, and in 1995 Netscape decided to embed a scripting language into it. The company pursued two approaches—working with Sun to embed Java and hiring Brendan Eich to embed Scheme—but management ultimately chose Eich to create a new language with Java-like syntax aimed at “the language for the masses.” The language was first shipped as LiveScript in a Navigator beta (September 1995) and was renamed JavaScript for the official December 1995 release. The name “JavaScript” was influenced by Java’s popularity during the dot-com boom, which led to confusion about whether it was directly related to Java. In the broader browser market, Microsoft’s Internet Explorer and its own interpreter, JScript, created early fragmentation: JScript differed from Netscape’s implementation, making cross-browser development difficult and encouraging “best viewed in” guidance. Netscape later submitted JavaScript to ECMA International in 1996, which helped establish the first ECMAScript specification (June 1997), but full standardization was hindered as Microsoft gained dominance and JScript became the de facto client-side scripting standard.

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Adoption by Microsoft and JScript differences

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