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Other References

CSSStyleDeclaration JS Conversion


JavaScript eval()

Voorbeelde

Voer JavaScript-kode uit met eval():

let x = 10;
let y = 20;
let text = "x * y";
let result = eval(text);

Moet nooit eval() gebruik nie. Gebruik eerder kode of 'n funksie:

let x = 10;
let y = 20;
let result = x * y;

Definisie en gebruik

Die eval()metode evalueer of voer 'n argument uit.

As die argument 'n uitdrukking is, eval()evalueer die uitdrukking. As die argument een of meer JavaScript-stellings is, eval()voer die stellings uit.

MOENIE eval() gebruik nie

Die uitvoering van JavaScript vanaf 'n string is 'n GROOT sekuriteitsrisiko.

Met eval(), kan kwaadwillige kode sonder toestemming binne jou toepassing loop.

Met eval(), kan derdeparty-kode die omvang van u toepassing sien, wat tot moontlike aanvalle kan lei.


Sintaksis

eval(string)

Grense

Parameter Description
string A JavaScript expression, variable, statement, or sequence of statements

Blaaierondersteuning

eval()is 'n ECMAScript1 (ES1) kenmerk.

ES1 (JavaScript 1997) word ten volle ondersteun in alle blaaiers:

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes