1. Introduction  
2. Data and Sample Selection  
2.1. The CEERS Survey  
2.2. Photometric Catalogs  
2.3. Spectroscopic Data  
2.4. Empirical Templates of EELGs  
2.5. Synthetic NIRCam Observations  
2.6. Color-Color Diagrams  
3. Data Analysis  
3.1. Photometric Fluxes  
3.2. Physical Parameters  
3.3. Physical Sizes and SFR Surface Density  
3.4. Comparison with NIRSpec Spectra  
4. Results and Discussion  
4.1. Young Starbursts  
4.2. Ionising Photon Production Efficiency ξ_ion  
4.3. Gas-Phase Metallicity  
4.4. Conditions for the Escape of Ionizing Photons  
5. Conclusions